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A216630 Number of nondecreasing arrays of n 0..n-1 integers with the sum of their 2nd powers equal to sum(i^2,i=0..n-1) 1
1, 1, 1, 1, 2, 4, 14, 37, 105, 309, 939, 2903, 8865, 28163, 90648, 297615, 989077, 3320885, 11280835, 38583017, 133018026, 461630411, 1612842357, 5667628973, 20019876401, 71078302590, 253504107762, 908014000543, 3265037780657 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,5
COMMENTS
Column 2 of A216635
LINKS
EXAMPLE
All solutions for n=6
..0....0....1....2
..1....0....2....2
..2....1....3....2
..3....2....3....3
..4....5....4....3
..5....5....4....5
CROSSREFS
Sequence in context: A263739 A333892 A135960 * A006611 A007462 A053623
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 11 2012
STATUS
approved

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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)