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A110130
Central coefficients of a scaled Legendre triangle.
0
1, 0, 2, 4, 22, 136, 504, 5136, 16966, 240368, 752800, 13660480, 41492284, 918172848, 2734083968, 71399743744, 209681631814, 6312095369056, 18348172005888, 625558677709824, 1804161160185748, 68713071248064560
OFFSET
0,3
COMMENTS
Central coefficients of triangle A110124.
FORMULA
a(n)=2^ceiling(n/2)*LegendreP(ceiling(n/2), floor(n/2));
PROG
(PARI) a(n)=2^ceil(n/2)*pollegendre(ceil(n/2), n\2) \\ Charles R Greathouse IV, Mar 19 2017
CROSSREFS
Sequence in context: A279705 A321248 A309741 * A259116 A283322 A019025
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Jul 13 2005
STATUS
approved