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A027017 a(n) = T(2*n+1, n+2), T given by A027011. 1
1, 7, 73, 373, 1404, 4506, 13226, 36889, 99947, 266455, 704150, 1852212, 4860468, 12739243, 33369709, 87385081, 228803856, 599048334, 1568366942, 4106082685, 10749916175, 28143706267, 73681248938, 192900093288, 505019090664, 1322157246031, 3461452722961 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
LINKS
FORMULA
G.f.: x*(1+43*x^2-31*x^3+17*x^4-7*x^5+x^6) / ((1-x)^4*(1-3*x+x^2)). - Colin Barker, Feb 19 2016
PROG
(PARI) Vec(x*(1+43*x^2-31*x^3+17*x^4-7*x^5+x^6)/((1-x)^4*(1-3*x+x^2)) + O(x^40)) \\ Colin Barker, Feb 19 2016
CROSSREFS
Sequence in context: A012158 A139966 A175205 * A076106 A202042 A294291
KEYWORD
nonn,easy
AUTHOR
STATUS
approved

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Last modified April 19 18:05 EDT 2024. Contains 371798 sequences. (Running on oeis4.)