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 A357443 #16 Nov 11 2022 09:53:29 %S A357443 1,1,1,2,1,2,3,4,1,2,3,5,4,6,7,8,1,2,3,5,9,4,6,10,7,11,8,13,12,14,15, %T A357443 16,1,2,3,5,9,17,4,6,10,18,7,11,19,8,13,22,12,20,14,23,15,25,16,27,21, %U A357443 24,26,29,28,30,31,32,1,2,3,5,9,17,33,4,6,10,18,34 %N A357443 Inventory sequence, second version: record where the 1's, 2's, etc. are located starting with a(1) = 1, a(2) = 1. %C A357443 Essentially the same as A358066, except that at stage k we record where all the numbers from 1 to 2^k have appeared in the sequence in earlier stages. (In A358066 we only look at where the numbers from 1 to k have appeared.) %C A357443 This means that when the sequence is displayed as a triangle, the row corresponding to stage k >= 1 is a permutation of the numbers from 1 to 2^k. %F A357443 a(n) = A356784(n-1) + 1. - _Rémy Sigrist_, Nov 08 2022 %e A357443 As an irregular triangle, the sequence begins: %e A357443 1, 1, %e A357443 1, 2, %e A357443 1, 2, 3, 4, %e A357443 1, 2, 3, 5, 4, 6, 7, 8, %e A357443 1, 2, 3, 5, 9, 4, 6, 10, 7, 11, 8, 13, 12, 14, 15, 16, %e A357443 1, 2, 3, 5, 9, 17, 4, 6, 10, 18, 7, 11, 19, 8, 13, 22, 12, 20, 14, 23, 15, 25, 16, 27, 21, 24, 26, 29, 28, 30, 31, 32, %e A357443 ... %Y A357443 Cf. A342585, A356784, A358066. %K A357443 nonn,tabf %O A357443 1,4 %A A357443 _Ctibor O. Zizka_, Oct 29 2022, edited by _N. J. A. Sloane_, Nov 07 2022. (Because of a missing term in the initial submission, the definition could be interpreted in two ways: A358066 was the first interpretation, this is the second.) %E A357443 More terms from _Rémy Sigrist_, Nov 08 2022