Pentagonal numbers that are products of smaller pentagonal numbers.

Terms

a(0) =1a(1) =10045a(2) =11310a(3) =20475a(4) =52360a(5) =197472a(6) =230300a(7) =341055a(8) =367290a(9) =836640a(10) =2437800a(11) =2939300a(12) =3262700a(13) =4048352a(14) =4268110a(15) =4293450a(16) =4619160a(17) =4816000a(18) =5969040a(19) =6192520a(20) =6913340a(21) =6997320a(22) =8531145a(23) =10933650a(24) =12397000a(25) =16008300a(26) =18573282a(27) =18816875a(28) =21430710a(29) =24383520