Pentagonal numbers that are the product of two pentagonal numbers greater than 1.

Terms

a(0) =10045a(1) =11310a(2) =52360a(3) =230300a(4) =341055a(5) =4048352a(6) =6192520a(7) =16008300a(8) =18573282a(9) =21430710a(10) =44175780a(11) =49452975a(12) =75377337a(13) =89579112a(14) =174695500a(15) =201243042a(16) =212087876a(17) =616116800a(18) =755319180a(19) =1369585525a(20) =1557466482a(21) =1586309340a(22) =1625178126a(23) =1674425676a(24) =1744607172a(25) =1857169860a(26) =1868270250a(27) =1985347551