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A061318 Column 3 of A061314. 4
0, 4, 40, 304, 1720, 7480, 26404, 79240, 209304, 499140, 1095160, 2242504, 4332640, 7966504, 14036260, 23829040, 39156304, 62512740, 97268904, 147902080, 220270120, 321933304, 462529540, 654208504, 912130600 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..24.

Index entries for linear recurrences with constant coefficients, signature (9,-36,84,-126,126,-84,36,-9,1)

FORMULA

a(n) =A061316(n)+A006007(n)^2 =4*A061319(n).

G.f. -4*x*(1+x+22*x^2+22*x^3+22*x^4+x^5+x^6) / (x-1)^9 . - R. J. Mathar, Aug 11 2012

CROSSREFS

Sequence in context: A283660 A215701 A212699 * A277652 A190541 A298198

Adjacent sequences:  A061315 A061316 A061317 * A061319 A061320 A061321

KEYWORD

nonn,easy

AUTHOR

Henry Bottomley, Apr 24 2001

STATUS

approved

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Last modified October 16 20:36 EDT 2021. Contains 348047 sequences. (Running on oeis4.)