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A027481 Second subdiagonal of triangle A027477, constructed from the Stirling numbers of the first kind. 0
23, 215, 1035, 3535, 9730, 23058, 48930, 95370, 173745, 299585, 493493, 782145, 1199380, 1787380, 2597940, 3693828, 5150235, 7056315, 9516815, 12653795, 16608438, 21542950, 27642550, 35117550, 44205525, 55173573, 68320665, 83980085, 102521960, 124355880 (list; graph; refs; listen; history; text; internal format)
OFFSET
3,1
LINKS
FORMULA
a(n) = A027477(n+2,n).
Conjectures from Chai Wah Wu, Apr 08 2021: (Start)
a(n) = 7*a(n-1) - 21*a(n-2) + 35*a(n-3) - 35*a(n-4) + 21*a(n-5) - 7*a(n-6) + a(n-7) for n > 9.
G.f.: x^3*(-13*x^2 - 54*x - 23)/(x - 1)^7. (End)
CROSSREFS
Cf. A027477.
Sequence in context: A171342 A112747 A201831 * A201211 A194783 A254870
KEYWORD
nonn,easy
AUTHOR
EXTENSIONS
More terms from Sean A. Irvine, Nov 06 2019
STATUS
approved

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Last modified July 22 00:58 EDT 2024. Contains 374478 sequences. (Running on oeis4.)