|
| |
|
|
A091918
|
|
Inverse of number triangle A091917.
|
|
1
| |
|
|
1, 2, 1, 4, 2, 1, 8, 3, 3, 1, 16, 4, 6, 4, 1, 32, 5, 10, 10, 5, 1, 64, 6, 15, 20, 15, 6, 1, 128, 7, 21, 35, 35, 21, 7, 1, 256, 8, 28, 56, 70, 56, 28, 8, 1, 512, 9, 36, 84, 126, 126, 84, 36, 9, 1, 1024, 10, 45, 120, 210, 252, 210, 120, 45, 10, 1, 2048, 11, 55, 165, 330, 462, 462, 330
(list; table; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
COMMENTS
| Essentially, Pascal's triangle A007318 with first column of 1's replaced by 2^n Row sums are A000225(n+1). Diagonal sums are A000225(n)+A000045(n).
|
|
|
FORMULA
| Binomial transform of triangle A103451: (1; 1,1; 1,0,1; 1,0,0,1;...). - Gary W. Adamson (qntmpkt(AT)yahoo.com), Aug 08 2007
|
|
|
CROSSREFS
| Cf. A103451.
Sequence in context: A135287 A089606 A140740 * A177953 A138895 A138846
Adjacent sequences: A091915 A091916 A091917 * A091919 A091920 A091921
|
|
|
KEYWORD
| nonn,tabl
|
|
|
AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Feb 13 2004
|
| |
|
|
