|
| |
|
|
A026049
|
|
a(n) = dot_product(1,2,...,n)*(7,8,...,n,1,2,3,4,5,6).
|
|
3
|
|
|
|
119, 156, 204, 265, 341, 434, 546, 679, 835, 1016, 1224, 1461, 1729, 2030, 2366, 2739, 3151, 3604, 4100, 4641, 5229, 5866, 6554, 7295, 8091, 8944, 9856, 10829, 11865, 12966, 14134, 15371, 16679, 18060, 19516, 21049, 22661, 24354, 26130, 27991, 29939, 31976, 34104, 36325, 38641, 41054
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
7,1
|
|
|
LINKS
|
Table of n, a(n) for n=7..52.
Index to sequences with linear recurrences with constant coefficients, signature (4,-6,4,-1).
|
|
|
FORMULA
|
a(n) = n(2n^2-15n+109)/6. - Ralf Stephan, Apr 30 2004
G.f.: x^7*(119-320*x+294*x^2-91*x^3)/(1-x)^4. - Colin Barker, Sep 17 2012
|
|
|
CROSSREFS
|
Column 6 of triangle A094414.
Sequence in context: A095629 A046007 A135716 * A134603 A134604 A207059
Adjacent sequences: A026046 A026047 A026048 * A026050 A026051 A026052
|
|
|
KEYWORD
|
nonn,easy,changed
|
|
|
AUTHOR
|
Clark Kimberling
|
|
|
STATUS
|
approved
|
| |
|
|
