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A097895
Number of compositions of n with at least 1 odd and 1 even part.
+0
1
0, 0, 2, 3, 11, 20, 51, 99, 222, 441, 935, 1872, 3863, 7751, 15774, 31653, 63939, 128232, 257963, 517011, 1037630, 2078417, 4165647, 8340192, 16702191, 33428943, 66912446, 133891725, 267921227, 536022488, 1072395555, 2145272571
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Maintained by
N. J. A. Sloane
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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.
AT&T Labs Research
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