login
A158144
Number of nondecreasing integer sequences of length 10 with sum zero and sum of absolute values 2n.
1
1, 4, 9, 25, 49, 118, 207, 414, 697, 1240, 1947, 3299, 4911, 7690, 11260, 16787, 23571, 34111, 46566, 65168, 87425, 118613, 155699, 207823, 267701, 349081, 444442, 569884, 714235, 904372, 1119056, 1396739, 1712996, 2110652, 2561649, 3129206
OFFSET
1,2
COMMENTS
a(n) = A000041(n)^2 for n<=5
a(n) = A000041(n)^2 - cumulative A000712(2*n-1-length), 0 <= 2*n-1-length <= floor(n/2) [empirical].
LINKS
CROSSREFS
Sequence in context: A277900 A344701 A182988 * A247136 A158145 A372743
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 13 2009
STATUS
approved