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