In mathematics, the look-and-say sequence is the sequence of integers beginning as follows: 1, 11, 21, 1211, 111221, 312211, 13112221, 1113213211, ... (sequence A005150 in the OEIS). To generate a member of the sequence from the previous member, read off the digits of the previous member...
The Look and say sequence is a recursively defined sequence of numbers studied most notably by John Conway. Sequence Definition. Take a decimal number. Look at the number, visually grouping consecutive runs of the same digit.
Find the n’th term in Look-and-say (Or Count and Say) Sequence.
Background. Look and Say Sequence. Definition. Rules For Creating The Sequence.
The lines show the growth of the numbers of digits in the look-and-say sequences with starting points 23 (red), 1 (blue), 13 (violet), 312 (green). These lines (when represented in a logarithmic scale) tend to straight lines whose slopes coincide with Conway's constant.
Replace a[i] by last here (you may not want to add anything in the first round). After the loop you have to add the last value of the counter together with the last character again (this was not yet done), i.e. add another result = result+str(k)+last after the loop. In total it looks like.
The look-and-say sequence was introduced and analyzed by John Conway in his paper "The Weird and Wonderful Chemistry of Audioactive Decay" published in Eureka 46, 5–18 in 1986.
Look and say sequence is the sequence of numbers generated from the previous number by reading off the digits of which the number consists.
(Greetings from The On-Line Encyclopedia of Integer Sequences!) A005150. Look and Say sequence: describe the previous term! (method A - initial term is 1). (Formerly M4780).
8 Ağu 2014 tarihinde yayınlandı. The legendary John H. Conway on properties he discovered within the so-called Look-and-Say Sequence.