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A136661 Unsigned fifth column (k=4) of triangle A136656 divided by 16. 2
1, 30, 645, 12495, 235305, 4452840, 86070600, 1713927600, 35318883600, 754896542400, 16751853518400, 386036370720000, 9235831629024000, 229285008336384000, 5902321642753536000, 157423965566579712000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Also unsigned fourth column of triangle A136657 divided by 8.

REFERENCES

Ch. A. Charalambides, Enumerative Combinatorics, Chapman & Hall/CRC, Boca Raton, Florida, 2002, Table 8.3, p. 311, with s=-2, k=4 column/16.

LINKS

Table of n, a(n) for n=0..15.

FORMULA

a(n)= |A136656(n+4,4)|/16, n>=0.

E.g.f.(derived from the one given for the column k=4 under A136656): (8+144*x+228*x^2-220*x^3-45*x^4+60*x^5-10*x^6)/(8*(1-x)^12).

CROSSREFS

Cf. A136660 (column k=3).

Sequence in context: A004359 A001777 A205828 * A264849 A111779 A075473

Adjacent sequences:  A136658 A136659 A136660 * A136662 A136663 A136664

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang Feb 22 2008

STATUS

approved

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Last modified January 19 09:35 EST 2020. Contains 331048 sequences. (Running on oeis4.)