Pentagonal pyramidal numbers that are products of smaller pentagonal pyramidal numbers.

A374501

Pentagonal pyramidal numbers that are products of smaller pentagonal pyramidal numbers.

Terms

    a(0) =1a(1) =56448a(2) =127008a(3) =259200a(4) =5644800a(5) =31840200a(6) =42688800a(7) =60766200a(8) =116493300a(9) =130662720a(10) =193179168a(11) =442828800a(12) =499000500a(13) =897544800a(14) =917632800a(15) =3624409800a(16) =6914880000a(17) =13831171200a(18) =15410656800a(19) =31246000128a(20) =53936416800a(21) =64024732800a(22) =72945774720a(23) =88957620000

External references