Square array read by antidiagonals: row n lists n-gonal pyramidal numbers that are products of smaller n-gonal pyramidal numbers.

A374498

Square array read by antidiagonals: row n lists n-gonal pyramidal numbers that are products of smaller n-gonal pyramidal numbers.

Terms

    a(0) =1a(1) =36a(2) =1a(3) =45a(4) =560a(5) =1a(6) =210a(7) =19600a(8) =4900a(9) =1a(10) =300a(11) =43680a(12) =513590a(13) =56448a(14) =1a(15) =378a(16) =45760a(17) =333833500a(18) =127008a(19) =4750a(20) =1a(21) =630a(22) =893200a(23) =711410700a(24) =259200a(25) =1926049000a(26) =58372180608a(27) =1

External references