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A034430
Expand arctan(sqrt(x)*sqrt(x+2))/(sqrt(x)*sqrt(x+2)) and multiply n-th term by 1.3.5...(2n+1).
+0
3
1, 2, 7, 36, 249, 2190, 23535, 299880, 4426065, 74294010, 1397669175, 29123671500, 665718201225, 16560190196550, 445300709428575, 12869793995058000, 397815487883438625
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Maintained by
N. J. A. Sloane
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Last modified December 9 14:43 EST 2009. Contains 170430 sequences.
AT&T Labs Research
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