login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A059440 A diagonal of A059438. 2
1, 3, 12, 58, 327, 2109, 15366, 125316, 1135329, 11348623, 124359336, 1484796894, 19204214363, 267627706257, 3998828758938, 63777662250440, 1081442839245381, 19426122224995107, 368492543629967292 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,2

REFERENCES

L. Comtet, Advanced Combinatorics, Reidel, 1974, p. 262 (#14).

LINKS

Table of n, a(n) for n=3..21.

FORMULA

G.f.: (1-1/Sum (k! x^k ))^3.

CROSSREFS

Sequence in context: A184511 A125276 A001426 * A020075 A020030 A121393

Adjacent sequences:  A059437 A059438 A059439 * A059441 A059442 A059443

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane, Feb 01 2001

EXTENSIONS

More terms from Vladeta Jovovic, Mar 04 2001

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified November 21 09:13 EST 2018. Contains 317431 sequences. (Running on oeis4.)