login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A126468 Column 2 of triangle A126465. 4
1, 1, 10, 255, 11935, 879571, 93365328, 13464554610, 2531141851260, 601339958510170, 176255315943299736, 62514948119465302825, 26407795709641456484010, 13109371824722841349352160 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
PROG
(PARI) {a(n)=local(M=matrix(n+3, n+3, r, c, if(r>=c, binomial((r-1)*r*(r+1)/3!-(c-1)*c*(c+1)/3!, r-c))), N=matrix(n+3, n+3, r, c, if(r>=c, binomial((r-1)*r*(r+1)/3!-(c-1)*c*(c+1)/3!+1, r-c)))); (N*M^-1)[n+3, 3]}
CROSSREFS
Cf. A126465, A126466, A126467; A126469 (row sums).
Sequence in context: A059166 A100743 A251588 * A336665 A024293 A361559
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 27 2006
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 29 03:51 EDT 2024. Contains 371264 sequences. (Running on oeis4.)