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A034269
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a(n)=f(n,n+2) where f is given in A034261.
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0
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0, 1, 11, 76, 435, 2255, 11011, 51688, 236028, 1056210, 4654430, 20266312, 87402185, 374008635, 1590144675, 6724160400, 28303504680, 118665923310, 495820606410, 2065492595400, 8581809094950, 35572994871414, 147149351758926, 607555878211376
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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FORMULA
| Appears to be a(n) = 4^(n+1)*Pi^(-1/2)*GAMMA(n+3/2)/GAMMA(n+5)*(n+1)*n*(n^2+3*n+1) - Mark van Hoeij, Oct 30 2011.
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CROSSREFS
| Sequence in context: A055901 A036427 A122589 * A056914 A039674 A059625
Adjacent sequences: A034266 A034267 A034268 * A034270 A034271 A034272
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KEYWORD
| nonn
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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EXTENSIONS
| Corrected and extended by N. J. A. Sloane (njas(AT)research.att.com), Apr 21 2000
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