Subtract 1 from each term of A004094 (the powers of 2 written backwards).

Terms

a(0) =0a(1) =1a(2) =3a(3) =7a(4) =60a(5) =22a(6) =45a(7) =820a(8) =651a(9) =214a(10) =4200a(11) =8401a(12) =6903a(13) =2917a(14) =48360a(15) =86722a(16) =63555a(17) =270130a(18) =441261a(19) =882424a(20) =6758400a(21) =2517901a(22) =4034913a(23) =8068837a(24) =61277760a(25) =23445532a(26) =46880175a(27) =827712430a(28) =654534861a(29) =219078634