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A110771
The r-th term of the n-th row of the following triangle is C[{T(n)-T(r-1)},r] where T(n) is the n-th triangular number. 1 3 1 6 10 1 10 36 35 1 ... Sequence contains the row sums.
+0
2
1, 4, 17, 82, 453, 2855, 20279, 159972, 1383544, 12987671, 131301747, 1420538383, 16358806638, 199606632428, 2570446661320, 34814885202341, 494470158654963, 7344794248474716, 113829232686474480
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 29 12:46 EST 2009. Contains 167659 sequences.
AT&T Labs Research
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