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!)
A144501 Main diagonal of array in A144502. 2
1, 2, 30, 1633, 198773, 42965211, 14505751627, 7051160946740, 4664901181968498, 4030793305701978223, 4407914679125170417031, 5950921219972964057360847, 9721118017169914469460646225, 18898282608956442548700379478918, 43117198379072165094561711078882078, 114089724623922992953782697056886301761 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Seiichi Manyama, Table of n, a(n) for n = 0..205

FORMULA

a(n) ~ 3^(3*n - 3/2) * n^(2*n - 1) / (2^(n-1) * exp(2*n - 1)). - Vaclav Kotesovec, Apr 06 2019

CROSSREFS

Cf. A144502.

Sequence in context: A262004 A132104 A208093 * A198861 A162841 A158260

Adjacent sequences:  A144498 A144499 A144500 * A144502 A144503 A144504

KEYWORD

nonn

AUTHOR

David Applegate and N. J. A. Sloane, Dec 13 2008

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 June 6 17:20 EDT 2020. Contains 334829 sequences. (Running on oeis4.)