Union of A057080 and A001090.

Terms

a(0) =1a(1) =1a(2) =9a(3) =8a(4) =71a(5) =63a(6) =559a(7) =496a(8) =4401a(9) =3905a(10) =34649a(11) =30744a(12) =272791a(13) =242047a(14) =2147679a(15) =1905632a(16) =16908641a(17) =15003009a(18) =133121449a(19) =118118440a(20) =1048062951a(21) =929944511a(22) =8251382159a(23) =7321437648a(24) =64962994321a(25) =57641556673a(26) =511452572409a(27) =453811015736