|
Search: id:A077864
|
|
|
| A077864 |
|
Expansion of (1-x)^(-1)/(1-x-2*x^2-x^3). |
|
+0
2
|
|
| 1, 2, 5, 11, 24, 52, 112, 241, 518, 1113, 2391, 5136, 11032, 23696, 50897, 109322, 234813, 504355, 1083304, 2326828, 4997792, 10734753, 23057166, 49524465, 106373551, 228479648, 490751216, 1054084064, 2264066145, 4862985490, 10445201845, 22435238971, 48188628152
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Diagonal sums of triangle using cumulative sums of odd-indexed rows of Pascal's triangle (cf. A020988). - Paul Barry (pbarry(AT)wit.ie), May 18 2003
|
|
FORMULA
|
a(0)=1, a(1)=2, a(2)=5, a(3)=11, a(n)=2*a(n-1)+a(n-2)-a(n-3)-a(n-4) for n>3 . - Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Oct 25 2006
|
|
CROSSREFS
|
Sequence in context: A027934 A134389 A111297 this_sequence A052980 A110513 A018115
Adjacent sequences: A077861 A077862 A077863 this_sequence A077865 A077866 A077867
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
njas, Nov 17 2002
|
|
|
Search completed in 0.002 seconds
|
