Number of permutations of {1,2,3,...,n} where the elements of n are considered indistinguishable if they differ by a power of 2 (for example 3, 12 and 24 are all considered equivalent).

A067281

Number of permutations of {1,2,3,...,n} where the elements of n are considered indistinguishable if they differ by a power of 2 (for example 3, 12 and 24 are all considered equivalent).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =3a(4) =4a(5) =20a(6) =60a(7) =420a(8) =840a(9) =7560a(10) =37800a(11) =415800a(12) =1663200a(13) =21621600a(14) =151351200a(15) =2270268000a(16) =7264857600a(17) =123502579200

External references