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!)
A136591 Column 1 of triangle A136590. 4
1, 1, -4, 6, 24, -240, 720, 5040, -80640, 362880, 3628800, -79833600, 479001600, 6227020800, -174356582400, 1307674368000, 20922789888000, -711374856192000, 6402373705728000, 121645100408832000, -4865804016353280000, 51090942171709440000 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..22.

FORMULA

E.g.f.:  log(1 + x + x^2).

a(n) = n!*A061347(n) for n>=1.

PROG

(PARI) {a(n) = n!*polcoeff( log(1+x+x^2 +x*O(x^(n+1))), n)}

for(n=1, 30, print1(a(n), ", "))

CROSSREFS

Cf. A136590, A136592, A136593, A136594; A061347.

Sequence in context: A032087 A165164 A241602 * A277997 A009459 A239625

Adjacent sequences:  A136588 A136589 A136590 * A136592 A136593 A136594

KEYWORD

sign

AUTHOR

Paul D. Hanna, Jan 10 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 17 05:18 EDT 2021. Contains 345080 sequences. (Running on oeis4.)