|
| |
|
|
A144638
|
|
Column 3 of triangle in A144633.
|
|
1
| |
|
|
0, 0, 0, 1, -6, 35, -210, 1225, -5670, -5005, 750750, -16391375, 278528250, -4130451325, 51941839950, -429736682375, -3328691115750, 297526876521875, -10250866397021250, 276000929009430625, -6284336658393543750, 114982352685697371875, -1137436827419674031250
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,5
|
|
|
LINKS
| Alois P. Heinz, Table of n, a(n) for n = 0..100
|
|
|
FORMULA
| E.g.f.: B(x)^3/6 where B(x) is e.g.f. for A144636. [From Vladeta Jovovic (vladeta(AT)eunet.yu), Jan 24 2009]
|
|
|
MAPLE
| A:= proc(n, k) option remember; if n=k then 1 elif k<n or n<1 then 0 else A(n-1, k-1) +(k-1) *A(n-1, k-2) +(k-1) *(k-2) *A(n-1, k-3)/2 fi end: M:= proc(n) option remember; Matrix(n+1, (i, j)-> A(i-1, j-1))^(-1) end: a:= n-> M (n+3)[4, n+1]: seq (a(n), n=0..25); # Alois P. Heinz, Oct 25 2009
|
|
|
CROSSREFS
| Sequence in context: A121838 A001109 A180033 * A117671 A000399 A081051
Adjacent sequences: A144635 A144636 A144637 * A144639 A144640 A144641
|
|
|
KEYWORD
| sign
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Jan 23 2009
|
|
|
EXTENSIONS
| More terms from Alois P. Heinz (heinz(AT)hs-heilbronn.de), Oct 25 2009
|
| |
|
|
