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A049609
a(n)=T(n,n+3), array T as in A049600.
0
0, 1, 7, 43, 253, 1462, 8378, 47818, 272422, 1550927, 8829033, 50276013, 286430763, 1632808572, 9313861092, 53163187748, 303653552188
OFFSET
0,3
FORMULA
Conjecture: -(n+3)*(n-1)*a(n) +(7*n^2+8*n-9)*a(n-1) +(-7*n^2+8*n+9)*a(n-2) +(n+1)*(n-3)*a(n-3)=0. - R. J. Mathar, Oct 26 2015
Conjecture: +n*(n+3)*(n-1)*a(n) -(2*n+1)*(3*n^2+3*n-4)*a(n-1) +(n-2)*(n+2)*(n+1)*a(n-2)=0. - R. J. Mathar, Oct 26 2015
CROSSREFS
Sequence in context: A125344 A163869 A043553 * A161728 A358682 A271197
KEYWORD
nonn
STATUS
approved