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.
%I A377906 #17 Nov 24 2024 09:21:54
%S A377906 1,12,16,56,93,136,168,321,332,363,409,411,443,467,1658,1688,1699,
%T A377906 1708,1715,1720,1913
%N A377906 Index of 10^n in A302656, or -1 if 10^n does not appear in A302656.
%C A377906 Also the indices of the 1's in A376769.
%C A377906 A term 10^n in A302656 is the trigger for an astronomically-sized term 2*10^{n 1's} - 1 later. For example, a(4) = 93 leads to the term A302656(176) = 2*10^1111 - 1 (cf. A377903, A377904).
%C A377906 a(0) through a(19) based on _Dominic McCarty_'s data in A302656.
%C A377906 The initial 21 terms form three groups of sizes 7, 7, and at least 7. It would be nice to know more terms.
%Y A377906 Summary: the 16 sequences derived from A302656 are A376769-A376776, A377903-A377904, A377906-A377911.
%K A377906 nonn,more
%O A377906 0,2
%A A377906 _N. J. A. Sloane_, Nov 22 2024