|
| |
|
|
A114002
|
|
Expansion of x^k(1+x^(k+1))/(1-x^(k+1)).
|
|
3
|
|
|
|
1, 2, 1, 2, 0, 1, 2, 2, 0, 1, 2, 0, 0, 0, 1, 2, 2, 2, 0, 0, 1, 2, 0, 0, 0, 0, 0, 1, 2, 2, 0, 2, 0, 0, 0, 1, 2, 0, 2, 0, 0, 0, 0, 0, 1, 2, 2, 0, 0, 2, 0, 0, 0, 0, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 2, 2, 2, 0, 2, 0, 0, 0, 0, 0, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 2, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 1
(list;
table;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,2
|
|
|
COMMENTS
|
Inverse is A114004. Row sums are A114003.
|
|
|
LINKS
|
Table of n, a(n) for n=0..104.
|
|
|
FORMULA
|
Column k has g.f. x^k(1+x^(k+1))/(1-x^(k+1))
Equals 2*A051731 - I, I = Identity matrix. - Gary W. Adamson, Nov 07 2007
|
|
|
EXAMPLE
|
Triangle begins
1;
2,1;
2,0,1;
2,2,0,1;
2,0,0,0,1;
2,2,2,0,0,1;
2,0,0,0,0,0,1;
|
|
|
CROSSREFS
|
Cf. A051731.
Sequence in context: A321104 A127442 A115628 * A114004 A306518 A333310
Adjacent sequences: A113999 A114000 A114001 * A114003 A114004 A114005
|
|
|
KEYWORD
|
easy,nonn,tabl
|
|
|
AUTHOR
|
Paul Barry, Nov 12 2005
|
|
|
STATUS
|
approved
|
| |
|
|
