A229656 6-section a(6n+k) gives k-th differences of a for k=0..5 with a(n)=0 for n<5 and a(5)=1.

0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, -5, 0, 0, 0, 1, -4, 10, 0, 0, 1, -3, 6, -10, 0, 1, -2, 3, -4, 5, 1, -1, 1, -1, 1, 0, 0, 0, 0, 0, 1, -10, 0, 0, 0, 1, -9, 35, 0, 0, 1, -8, 26, -60, 0, 1, -7, 18, -34, 55, 1, -6, 11, -16, 21, -25, -5, 5, -5, 5, -4, -4, 0, 0, 0, 1

Offset

0,12

Links

Alois P. Heinz, Table of n, a(n) for n = 0..10000

Formula

a(6*n+k) = Sum_{j=0..k} (-1)^j * C(k,j) * a(n+k-j) for k=0..5.

Maple

a:= proc(n) option remember; local m, q;
      m:= irem(n, 6, 'q'); `if`(n<6, `if`(n=5, 1, 0),
      add(a(q+m-j)*(-1)^j*binomial(m, j), j=0..m))
    end:
seq(a(n), n=0..100);

Crossrefs

Cf. A005590, A229653, A229654, A229655, A229657, A229658, A229659, A229660.

Sequence in context: A324656 A325817 A325967 * A216722 A368865 A036297

Adjacent sequences: A229653 A229654 A229655 * A229657 A229658 A229659

Keyword

sign,eigen,look

Author

Alois P. Heinz, Sep 27 2013

Status

approved