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A316357
Partial sums of A316316.
1
1, 5, 13, 21, 33, 53, 73, 93, 121, 153, 185, 221, 261, 305, 353, 401, 453, 513, 573, 633, 701, 773, 845, 921, 1001, 1085, 1173, 1261, 1353, 1453, 1553, 1653, 1761, 1873, 1985, 2101, 2221, 2345, 2473, 2601, 2733, 2873, 3013, 3153, 3301, 3453, 3605, 3761, 3921
OFFSET
0,2
FORMULA
Conjectures from Colin Barker, Dec 13 2018: (Start)
G.f.: (1 + 3*x + 5*x^2 + 2*x^3 + 5*x^4 + 3*x^5 + x^6) / ((1 - x)^3*(1 + x^2)*(1 + x + x^2)).
a(n) = 2*a(n-1) - 2*a(n-2) + 3*a(n-3) - 3*a(n-4) + 2*a(n-5) - 2*a(n-6) + a(n-7) for n>6.
(End)
CROSSREFS
Cf. A316316.
Sequence in context: A273453 A299770 A294962 * A252296 A273569 A273750
KEYWORD
nonn
AUTHOR
Rémy Sigrist, Jun 30 2018
STATUS
approved