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 A374500 #6 Jul 11 2024 08:38:31 %S A374500 1,4900,513590,333833500,711410700,1042716675,1429018500,26088481055, %T A374500 62366724420,5223660842400,18289944673000 %N A374500 Square pyramidal numbers that are products of smaller square pyramidal numbers. %e A374500 1 is a term because it is a square pyramidal number and equals the empty product. %e A374500 4900 is a term because it is a square pyramidal number and equals the product of the square pyramidal numbers 5, 5, 14, and 14. %e A374500 513590 is a term because it is a square pyramidal number and equals the product of the square pyramidal numbers 506 and 1015. %e A374500 Further examples: %e A374500 333833500 = 506*650*1015, %e A374500 711410700 = 5*385*369564, %e A374500 1042716675 = 55*91*208335, %e A374500 1429018500 = 285*650*7714, %e A374500 26088481055 = 91*8555*33511, %e A374500 62366724420 = 30*3311*627874, %e A374500 5223660842400 = 140*12529*2978040, %e A374500 18289944673000 = 56980*320988850. %Y A374500 Row n=4 of A374498. %Y A374500 Cf. A000330, A374501, A374502. %K A374500 nonn,more %O A374500 1,2 %A A374500 _Pontus von Brömssen_, Jul 09 2024