|
Search: id:A136661
|
|
|
| A136661 |
|
Unsigned fifth column (k=4) of triangle A136656 divided by 16. |
|
+0
3
|
|
| 1, 30, 645, 12495, 235305, 4452840, 86070600, 1713927600, 35318883600, 754896542400, 16751853518400, 386036370720000, 9235831629024000, 229285008336384000, 5902321642753536000, 157423965566579712000
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
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.
|
|
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).
Adjacent sequences: A136658 A136659 A136660 this_sequence A136662 A136663 A136664
Sequence in context: A001719 A004359 A001777 this_sequence A111779 A075473 A051563
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de) Feb 22 2008
|
|
|
Search completed in 0.002 seconds
|
