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 A147292 #12 Dec 11 2019 07:09:58 %S A147292 1,1,1,2,1,2,5,2,2,5,13,5,4,5,14,34,13,10,10,14,41,89,34,26,25,28,41, %T A147292 122,233,89,68,65,70,82,122,365,610,233,178,170,182,205,244,365,1094, %U A147292 1597,610,466,445,476,533,610,730,1094,3281 %N A147292 Eigentriangle. %C A147292 Left column = odd-indexed Fibonacci numbers prefaced with a 1. %C A147292 Right border = A007051 shifted. %C A147292 Row sums are A007051. %F A147292 Let M = an infinite lower triangular matrix with odd-indexed Fibonacci numbers in every column prefaced with a 1: (1, 1, 2, 5, 13, 34, ...). Q = an infinite lower triangular matrix with A007051 prefaced with a 1 as the main diagonal: (1, 1, 2, 5, 14, 41, 122, 365, 1094, ...); and the rest zeros. %F A147292 A147292 = M * Q %e A147292 First few rows of the triangle = %e A147292 1; %e A147292 1, 1; %e A147292 2, 1, 2; %e A147292 5, 2, 2, 5; %e A147292 13, 5, 4, 5, 14; %e A147292 34, 13, 10, 10, 14, 41; %e A147292 89, 34, 26, 25, 28, 41, 122; %e A147292 233, 89, 68, 65, 70, 82, 122, 365; %e A147292 610, 233, 178, 170, 182, 205, 244, 365, 1094; %e A147292 1597, 610, 466, 445, 476, 533, 610, 730, 1094, 3281; %e A147292 4181, 1597, 1220, 1665, 1246, 1394, 1586, 1825, 2188, 3281, 9842; %e A147292 10946, 4181, 3194, 3050, 3262, 3649, 4148, 4745, 5470, 6562, 9842, 29525; %e A147292 ... %e A147292 Row 4 = (13, 5, 4, 5, 14) = termwise products of (13, 5, 2, 1, 1) and (1, 1, 2, 5, 14). %K A147292 eigen,nonn,tabl %O A147292 0,4 %A A147292 _Gary W. Adamson_, Nov 05 2008