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A294440
Triangle read by rows: T(n,k) (n >= 1, 1 <= k <= n) = number of normalized 2n-plets, with single or double steps, associated to trees with k edges.
0
1, 2, 1, 4, 6, 1, 8, 25, 12, 1, 16, 90, 85, 20, 1, 32, 301, 476, 215, 30, 1, 64, 966, 2345, 1722, 455, 42, 1, 128, 3025, 10696, 11659, 4928, 854, 56, 1, 256, 9330, 46453, 71082, 43779, 12012, 1470, 72, 1, 512, 28501, 195340, 404540, 342642, 135357, 26040, 2370, 90, 1
OFFSET
1,2
LINKS
M. Bauer and O. Golinelli, Random incidence matrices: Moments of the spectral density, arXiv:cond-mat/0007127 [cond-mat.stat-mech], 2000-2001; J. Stat. Phys. 103, 301-307 (2001).
EXAMPLE
Triangle begins:
1;
2, 1;
4, 6, 1;
8, 25, 12, 1;
16, 90, 85, 20, 1;
32, 301, 476, 215, 30, 1;
64, 966, 2345, 1722, 455, 42, 1;
128, 3025, 10696, 11659, 4928, 854, 56, 1;
256, 9330, 46453, 71082, 43779, 12012, 1470, 72, 1;
512, 28501, 195340, 404540, 342642, 135357, 26040, 2370, 90, 1;
...
CROSSREFS
Sequence in context: A359670 A114192 A114656 * A346905 A075497 A158983
KEYWORD
nonn,tabl
AUTHOR
N. J. A. Sloane, Nov 20 2017
STATUS
approved