OFFSET
0,2
COMMENTS
Let M be the matrix M(n,k)=J(k+1)*sum{j=0..n, (-1)^(n-j)C(n,j)C(j+1,k+1)}. a(n) gives the row sums of M^4.
LINKS
Index entries for linear recurrences with constant coefficients, signature (10,120,-320,-1024).
FORMULA
MATHEMATICA
CoefficientList[Series[(1+x)(1-6x-25x^2)/((1+2x)(1-4x)(1+8x)(1-16x)), {x, 0, 20}], x] (* or *) LinearRecurrence[{10, 120, -320, -1024}, {1, 5, 139, 1645}, 20] (* Harvey P. Dale, Dec 04 2017 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Sep 18 2006
STATUS
approved