A055589 Convolution of A049612 with A011782.

0, 1, 6, 26, 96, 321, 1002, 2972, 8472, 23392, 62912, 165504, 427264, 1085184, 2717184, 6718464, 16427008, 39763968, 95387648, 226951168, 535953408, 1257046016, 2929852416, 6789267456, 15648423936, 35888562176, 81927340032

Offset

0,3

Comments

Sixth column of triangle A055587. T(n,4) of array T as in A049600.

Links

Table of n, a(n) for n=0..26.

Index entries for linear recurrences with constant coefficients, signature (10, -40, 80, -80, 32).

Formula

a(n)= T(n, 4)= A055587(n+4, 5).

G.f.: x*((1-x)^4)/(1-2*x)^5.

Crossrefs

Cf. A049600, A049612, A055587, A011782.

Sequence in context: A000393 A106392 A143132 * A318947 A377679 A320816

Adjacent sequences: A055586 A055587 A055588 * A055590 A055591 A055592

Keyword

nonn,easy

Author

Wolfdieter Lang, May 30 2000

Status

approved