Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #20 Apr 11 2019 22:48:19
%S 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 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 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 Triangle read by rows in which row n lists the first 2^n terms of A323642, n >= 1.
%F a(n) = A323651(n+2)/4.
%e Written as an irregular triangle in which the row lengths are the terms of A000079 multiplied by 2 the sequence begins:
%e 1,2;
%e 1,2,3,6;
%e 1,2,3,6,3,6,9,18;
%e 1,2,3,6,3,6,9,18,3,6,9,18,9,18,27,54;
%e 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 ...
%e It appears that the right border gives A008776.
%Y Cf. A000079, A008776, A139251, A147582, A323642, A323649, A323650, A323651.
%K nonn,tabf
%O 1,2
%A _Omar E. Pol_, Mar 03 2019