Enneagonal numbers for which the product of the digits is also an enneagonal number.

Terms

a(0) =0a(1) =1a(2) =9a(3) =46a(4) =111a(5) =204a(6) =750a(7) =1089a(8) =1350a(9) =2301a(10) =3075a(11) =3504a(12) =4200a(13) =5500a(14) =6069a(15) =10071a(16) =10450a(17) =10836a(18) =12036a(19) =12450a(20) =15081a(21) =16014a(22) =19500a(23) =20026a(24) =20559a(25) =21099a(26) =22200a(27) =23904a(28) =25075a(29) =27501