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A226920 Array read by antidiagonals: T(n,k) = number of completely symmetric polynomials of degree k up to momentum conservation for n particles (n >= 4, k >= 0). 1
1, 1, 0, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 2, 2, 1, 1, 0, 1, 2, 4, 2, 2, 1, 0, 1, 2, 4, 6, 5, 1, 1, 0, 1, 2, 5, 8, 13, 4, 2, 1, 0, 1, 2, 5, 10, 20, 19, 8, 2, 1, 0, 1, 2, 5, 10, 28, 36, 36, 9, 2 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
4,19
LINKS
R. H. Boels, On the field theory expansion of superstring five point amplitudes, arXiv preprint arXiv:1304.7918, 2013
EXAMPLE
Array begins:
1,0,1,1,1,1,2,1,2,2,2,2,3,2,3,...
1,0,1,1,2,2,5,4,8,9,13,15,23,24,34,...
1,0,1,2,4,6,13,19,36,58,97,149,244,364,558,...
1,0,1,2,4,8,20,36,83,169,344,680,1342,2518,4695,...
1,0,1,2,5,10,28,59,152,364,885,2093,4930,11199,25021,...
1,0,1,2,5,10,31,72,205,557,1565,4321,11942,32131,84927,...
1,0,1,2,5,11,33,81,246,722,2222,6875,21497,66299,202179,...
...
CROSSREFS
Columns converge to A226919.
Sequence in context: A327747 A282750 A265890 * A362759 A123736 A358476
KEYWORD
nonn,tabl,more
AUTHOR
N. J. A. Sloane, Jul 12 2013
STATUS
approved

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Last modified May 29 00:29 EDT 2024. Contains 372921 sequences. (Running on oeis4.)