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 A316324 #9 May 07 2019 23:13:43 %S A316324 0,5,9,14,19,23,28,31,36,40,45,49,54,57,62,66,71,76,80,85,88,93,97, %T A316324 102,107,111,116,119,124,128,133,137,142,145,150,154,159,164,168,173, %U A316324 176,181,185,190,193,198,202,207,212,216,221,224,229,233,238,242,247,250,255,259,264,269,273,278 %N A316324 Indices of 1's in A305389. %H A316324 Robert Israel, <a href="/A316324/b316324.txt">Table of n, a(n) for n = 1..10000</a> %p A316324 f:= 'f': %p A316324 f(1):= 2: f(2):= 3: f(3):= (1,2,3): %p A316324 S:= [1]; %p A316324 for i from 1 to 5 do T:= map(f,S); U:= map(f,T); S:= map(f,U); od: %p A316324 select(t -> S[t+1]=1, [$0..nops(S)-1]); # _Robert Israel_, May 07 2019 %Y A316324 Cf. A305389. %Y A316324 A316324, A316325, A316326 have the same relation to A305389 as A003144, A003145, A003146 do to the ternary tribonacci word A080843 (or A092782). %K A316324 nonn %O A316324 1,2 %A A316324 _N. J. A. Sloane_, Jul 09 2018