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A095892
a(n) = sum of the squares of the coefficients of x^n in x^(n-2k)*A(x^2)^(n-2k), as k varies from 0 to floor(n/2), with a(0)=1.
+0
4
1, 1, 1, 2, 5, 11, 26, 66, 173, 469, 1307, 3676, 10506, 30260, 87922, 256990, 756381, 2236409, 6648893, 19846902, 59507503, 179051839, 540778436, 1638019284, 4977317066, 15162490432, 46314401884, 141773634376, 434993794258
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.
AT&T Labs Research
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