cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A117999 Decimal number generated by the binary bits of the n-th generation of the Rule 110 elementary cellular automaton.

Original entry on oeis.org

1, 6, 28, 104, 496, 1568, 7360, 27520, 130304, 396800, 1848320, 6879232, 32706560, 103702528, 485867520, 1799258112, 8569421824, 25897336832, 120686641152, 448682000384, 2137705676800, 6768178495488, 31718320898048, 118691479945216, 558749693509632
Offset: 0

Views

Author

Eric W. Weisstein, Apr 08 2006

Keywords

Examples

			1;  1, 1, 0;  1, 1, 1, 0, 0;  1, 1, 0, 1, 0, 0, 0;  1, 1, 1, 1, 1, 0, 0, 0, 0; ...
		

Crossrefs

Cf. A006978.

Programs

  • Mathematica
    A117999list[nmax_]:=MapIndexed[FromDigits[ArrayPad[#1,#2-nmax-1],2]&,CellularAutomaton[110,{{1},0},{nmax,All}]];A117999list[25] (* Paolo Xausa, Oct 04 2023 *)

Formula

a(n) = A006978(n+1)*2^n. - Pontus von Brömssen, Oct 18 2022