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A158148 Number of nondecreasing integer sequences of length 14 with sum zero and sum of absolute values 2n. 1
1, 4, 9, 25, 49, 121, 225, 481, 882, 1690, 2899, 5275, 8622, 14633, 23387, 37834, 58113, 90924, 135610, 204938, 299216, 438428, 625118, 897211, 1253138, 1756603, 2414933, 3322105, 4489393, 6080038, 8096013, 10793738, 14197556, 18663320, 24250155 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = A000041(n)^2 for n<=7

a(n) = A000041(n)^2 - cumulative A000712(2*n-1-length), 0 <= 2*n-1-length <= floor(n/2) [empirical].

LINKS

R. H. Hardin, Table of n, a(n) for n=1..433

CROSSREFS

Sequence in context: A038771 A158146 A158147 * A158149 A158150 A158151

Adjacent sequences:  A158145 A158146 A158147 * A158149 A158150 A158151

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 13 2009

STATUS

approved

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Last modified September 29 18:39 EDT 2022. Contains 357090 sequences. (Running on oeis4.)