a(n) is the number of ways to write the number n as dk...di...d2d1d0 where digit di represents di * (di+1)^i, restricting di to 0..9.

A038810

a(n) is the number of ways to write the number n as dk...di...d2d1d0 where digit di represents di * (di+1)^i, restricting di to 0..9.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =2a(4) =3a(5) =3a(6) =5a(7) =5a(8) =6a(9) =6a(10) =7a(11) =7a(12) =8a(13) =8a(14) =9a(15) =9a(16) =9a(17) =9a(18) =11a(19) =11a(20) =13a(21) =13a(22) =13a(23) =13a(24) =15a(25) =15a(26) =16a(27) =16a(28) =17a(29) =17

External references