Number of positive integers with n digits whose digit sum is equal to its digit product.

Terms

a(0) =9a(1) =1a(2) =6a(3) =12a(4) =40a(5) =30a(6) =84a(7) =224a(8) =144a(9) =45a(10) =605a(11) =495a(12) =1170a(13) =1092a(14) =210a(15) =240a(16) =2448a(17) =4896a(18) =15846a(19) =3420a(20) =1750a(21) =462a(22) =15939a(23) =0a(24) =8100a(25) =67925a(26) =80730a(27) =19656a(28) =11774a(29) =164430