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A216642
Number of nondecreasing arrays of n 1..n integers with the sum of their 4th powers equal to sum(i^4,i=1..n)
0
1, 1, 1, 1, 1, 1, 2, 2, 5, 11, 25, 51, 136, 367, 886, 2507, 6986, 20453, 60708, 172073, 524771, 1628140, 5085497
OFFSET
1,7
COMMENTS
Column 4 of A216645
EXAMPLE
All solutions for n=9
..3....1....1....1....1
..3....3....2....1....1
..4....3....3....2....1
..5....5....4....2....2
..6....6....5....4....5
..7....6....6....5....7
..7....6....7....6....8
..8....8....8....9....8
..8....9....9....9....8
CROSSREFS
Sequence in context: A109278 A367966 A112527 * A227999 A049680 A153983
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 11 2012
STATUS
approved