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 A323641 #20 Apr 11 2019 22:48:19 %S A323641 1,2,1,2,3,6,1,2,3,6,3,6,9,18,1,2,3,6,3,6,9,18,3,6,9,18,9,18,27,54,1, %T A323641 2,3,6,3,6,9,18,3,6,9,18,9,18,27,54,3,6,9,18,9,18,27,54,9,18,27,54,27, %U A323641 54,81,162,1,2,3,6,3,6,9,18,3,6,9,18,9,18,27,54,3,6,9,18,9,18,27,54,9,18 %N A323641 Triangle read by rows in which row n lists the first 2^n terms of A323642, n >= 1. %F A323641 a(n) = A323651(n+2)/4. %e A323641 Written as an irregular triangle in which the row lengths are the terms of A000079 multiplied by 2 the sequence begins: %e A323641 1,2; %e A323641 1,2,3,6; %e A323641 1,2,3,6,3,6,9,18; %e A323641 1,2,3,6,3,6,9,18,3,6,9,18,9,18,27,54; %e A323641 1,2,3,6,3,6,9,18,3,6,9,18,9,18,27,54,3,6,9,18,9,18,27,54,9,18,27,54,27,54,81,162; %e A323641 ... %e A323641 It appears that the right border gives A008776. %Y A323641 Cf. A000079, A008776, A139251, A147582, A323642, A323649, A323650, A323651. %K A323641 nonn,tabf %O A323641 1,2 %A A323641 _Omar E. Pol_, Mar 03 2019