Sequence h_n arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition).

A129874

Sequence h_n arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition).

Terms

    a(0) =2a(1) =1a(2) =4a(3) =4a(4) =16a(5) =19a(6) =76a(7) =98a(8) =392a(9) =531a(10) =2124a(11) =2974a(12) =11896a(13) =17060a(14) =68240a(15) =99658a(16) =398632a(17) =590563a(18) =2362252a(19) =3540464a(20) =14161856a(21) =21430267a(22) =85721068a(23) =130771376a(24) =523085504a(25) =803538100a(26) =3214152400a(27) =4967127736a(28) =19868510944a(29) =30866224824

External references