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A115137
Second diagonal of triangle
A113647
(called Y(2,1)).
+0
2
1, 1, 7, 41, 247, 1545, 9975, 66057, 446455, 3067913, 21372919, 150618121, 1071841271, 7691763721, 55600938999, 404488323081, 2959189475319, 21757613309961, 160691417776119, 1191577871450121, 8868160862158839
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Maintained by
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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.
AT&T Labs Research
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