Pentagonal numbers for which the product of the digits is also a pentagonal number.

Terms

a(0) =0a(1) =1a(2) =5a(3) =51a(4) =70a(5) =210a(6) =330a(7) =590a(8) =715a(9) =1001a(10) =1080a(11) =1162a(12) =1520a(13) =1820a(14) =2035a(15) =2380a(16) =2501a(17) =3015a(18) =3290a(19) =3725a(20) =4030a(21) =4510a(22) =5017a(23) =5370a(24) =6112a(25) =6305a(26) =6501a(27) =6700a(28) =6902a(29) =7107