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 A374501 #5 Jul 11 2024 08:38:35 %S A374501 1,56448,127008,259200,5644800,31840200,42688800,60766200,116493300, %T A374501 130662720,193179168,442828800,499000500,897544800,917632800, %U A374501 3624409800,6914880000,13831171200,15410656800,31246000128,53936416800,64024732800,72945774720,88957620000 %N A374501 Pentagonal pyramidal numbers that are products of smaller pentagonal pyramidal numbers. %e A374501 1 is a term because it is a pentagonal pyramidal number and equals the empty product. %e A374501 56448 is a term because it is a pentagonal pyramidal number and equals the product of the pentagonal pyramidal numbers 196 and 288. %e A374501 127008 is a term because it is a pentagonal pyramidal number and equals the product of the pentagonal pyramidal numbers 6, 6, 18, and 196. %Y A374501 Row n=5 of A374498. %Y A374501 Cf. A002411, A374500, A374502. %K A374501 nonn %O A374501 1,2 %A A374501 _Pontus von Brömssen_, Jul 09 2024