A191111 Describe 10^n. Also called the "Say What You See" or "Look and Say" sequence LS(10^n).

11, 1110, 1120, 1130, 1140, 1150, 1160, 1170, 1180, 1190, 11100, 11110, 11120, 11130, 11140, 11150, 11160, 11170, 11180, 11190, 11200, 11210, 11220, 11230, 11240, 11250, 11260, 11270, 11280, 11290, 11300, 11310, 11320, 11330, 11340, 11350, 11360, 11370, 11380, 11390, 11400, 11410

Offset

0,1

Links

Table of n, a(n) for n=0..41.

Formula

a(n) = A045918(A011557(n)) = A045918(10^n).

For n > 0, a(n) = 11 & 10n where & denotes decimal concatenation. - Charles R Greathouse IV, May 26 2011

Example

a(0) = 11 (one '1').
a(1) = 1110 (one '1', one '0').
a(2) = 1120 (one '1', two '0's).

Prog

(PARI) print1(11); for(n=1, 99, print1(", 11"n, 0)) \\ Charles R Greathouse IV, May 26 2011

Crossrefs

Cf. A011557, A045918.

Sequence in context: A110574 A280042 A287044 * A127851 A135656 A130602

Adjacent sequences: A191108 A191109 A191110 * A191112 A191113 A191114

Keyword

nonn,easy,base

Author

Jonathan Vos Post, May 26 2011

Status

approved