|
| |
|
|
A046902
|
|
Clark's triangle: left border = 0 1 1 1..., right border = multiples of 6; other entries = sum of 2 entries above.
|
|
2
| |
|
|
0, 1, 6, 1, 7, 12, 1, 8, 19, 18, 1, 9, 27, 37, 24, 1, 10, 36, 64, 61, 30, 1, 11, 46, 100, 125, 91, 36, 1, 12, 57, 146, 225, 216, 127, 42, 1, 13, 69, 203, 371, 441, 343, 169, 48, 1, 14, 82, 272, 574, 812, 784, 512, 217, 54, 1, 15, 96, 354, 846, 1386, 1596, 1296, 729, 271
(list; table; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,3
|
|
|
REFERENCES
| J. E. Clark, Clark's triangle, Math. Student, 26 (No. 2, 1978), p. 4.
|
|
|
FORMULA
| c(n, k) = 6*binomial(n, k-1) + binomial(n-1, k). - Max Alekseyev (maxale(AT)gmail.com), Nov 06 2005
|
|
|
EXAMPLE
| 0; 1 6; 1 7 12; 1 8 19 18;...
|
|
|
CROSSREFS
| Cf. A100206.
Sequence in context: A198420 A110942 A082830 * A204205 A143019 A156921
Adjacent sequences: A046899 A046900 A046901 * A046903 A046904 A046905
|
|
|
KEYWORD
| nonn,easy,tabl,nice
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
|
|
|
EXTENSIONS
| More terms from Larry Reeves (larryr(AT)acm.org), Apr 07 2000
More terms from Max Alekseyev (maxale(AT)gmail.com), May 12 2005
|
| |
|
|
