A049064 Describe the previous term in binary (method A - initial term is 0).

0, 10, 1110, 11110, 100110, 1110010110, 111100111010110, 100110011110111010110, 1110010110010011011110111010110, 1111001110101100111001011010011011110111010110, 1001100111101110101100111100111010110111001011010011011110111010110

Offset

1,2

Comments

Method A = 'frequency' (in binary mode) followed by 'digit'-indication.

The number of digits of a(n) is A001609(n) except for n = 2. See the link from T. Sillke below. - Jianing Song, Mar 16 2019

Links

Kade Robertson, Table of n, a(n) for n = 1..18

Kade Robertson, Table of n, a(n) for n = 1..31

T. Sillke, The binary form of Conway's sequence

Formula

a(n) = A001391(n-1), n > 1. - R. J. Mathar, Oct 15 2008

Example

E.g., the term after 11110 is obtained by saying "four (i.e., 100 in binary mode) 1, one 0", which gives 100110.

Crossrefs

Cf. A001387 (initial term is 1), A001391, A001609 (number of digits), A259710 (written in decimal).

Decimal look-and-say sequences: A005150, A006751, A006715, A001140, A001141, A001143, A001145, A001151, A001154.

Sequence in context: A036058 A001155 A001391 * A267246 A355316 A266589

Adjacent sequences: A049061 A049062 A049063 * A049065 A049066 A049067

Keyword

base,easy,nice,nonn

Author

Olivier de Mouzon

Extensions

Edited by Charles R Greathouse IV, Apr 06 2010

a(11) from Kade Robertson, Jun 24 2015

Offset corrected by Jianing Song, Mar 16 2019

Status

approved