login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A091032 Second column (k=3) of array A090438 ((4,2)-Stirling2) divided by 8. 2
1, 60, 5040, 604800, 99792000, 21794572800, 6102480384000, 2134124568576000, 912338253066240000, 468333636574003200000, 284372184127734743040000, 201645730563302817792000000, 165147853331345007771648000000 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,2

LINKS

Table of n, a(n) for n=2..14.

FORMULA

a(n)= A090438(n, 3)/8 = (n-1)*(2*n)!/4!

E.g.f.: (-3*hypergeom([1/2, 1], [], 4*x) + hypergeom([1, 3/2], [], 4*x) + 2)/(8*3!) (cf. A090438).

CROSSREFS

Cf. A002674 (first column of A090438), A091033 (third column).

Sequence in context: A074076 A084274 A289307 * A328951 A178785 A091753

Adjacent sequences:  A091029 A091030 A091031 * A091033 A091034 A091035

KEYWORD

nonn,easy

AUTHOR

Wolfdieter Lang, Jan 23 2004

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 7 10:46 EDT 2020. Contains 333301 sequences. (Running on oeis4.)