|
Search: id:A027782
|
|
| |
|
| 36, 405, 2475, 10890, 38610, 117117, 315315, 772200, 1750320, 3719430, 7482618, 14360580, 26453700, 47006190, 80901810, 135326664, 220641300, 351511875, 548358525, 839188350, 1261890630, 1867083075, 2721610125, 3912807600
(list; graph; listen)
|
|
|
OFFSET
|
0,1
|
|
|
FORMULA
|
Number of 12-subsequences of [ 1, n ] with just 2 contiguous pairs; g.f. 9*(4+x)/(1-x)^11
C(n+8, n)*C(n+9, 2) - Zerinvary Lajos (zlaja(AT)freemail.hu), Apr 28 2005
|
|
MATHEMATICA
|
Table[9*(n + 1)*Binomial[n + 2, 9]/2, {n, 7, 40}] - Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Apr 09 2006
|
|
CROSSREFS
|
Sequence in context: A086575 A055862 A105095 this_sequence A110693 A104671 A128986
Adjacent sequences: A027779 A027780 A027781 this_sequence A027783 A027784 A027785
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
thi ngoc dinh (via rkg(AT)cpsc.ucalgary.ca)
|
|
EXTENSIONS
|
More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Apr 09 2006
|
|
|
Search completed in 0.002 seconds
|
