OFFSET
0,6
REFERENCES
L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 120, D(n;1,5,7).
LINKS
Index entries for linear recurrences with constant coefficients, signature (1,0,0,0,1,-1,1,-1,0,0,0,-1,1).
FORMULA
a(n) = round((n^2+13*n+36)/70).
a(n) = a(n-1) + a(n-5) - a(n-6) + a(n-7) - a(n-8) - a(n-12) + a(n-13). - R. J. Mathar, Aug 21 2014
MATHEMATICA
CoefficientList[Series[1/((1-x)(1-x^5)(1-x^7)), {x, 0, 60}], x] (* or *) LinearRecurrence[{1, 0, 0, 0, 1, -1, 1, -1, 0, 0, 0, -1, 1}, {1, 1, 1, 1, 1, 2, 2, 3, 3, 3, 4, 4, 5}, 70] (* Harvey P. Dale, Apr 30 2018 *)
PROG
(PARI) Vec(1/((1-x)*(1-x^5)*(1-x^7)) + O(x^70)) \\ Jinyuan Wang, Feb 28 2020
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
More terms from Jinyuan Wang, Feb 28 2020
STATUS
approved