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A082292 (2n+1) * (2n)! / sqrt(4*(n+1)*prod(k=1...2n+1, lcm(k,2n+2-k))). 1
1, 1, 2, 12, 4, 8, 72, 160, 16, 3456, 32, 1792, 129600, 1024, 128, 1492992, 256, 2048000, 18289152, 180224, 1024, 573308928, 1280000, 1703936, 241864704, 719323136, 8192, 64497254400000, 16384, 33554432, 234125033472, 142606336 (list; graph; refs; listen; history; internal format)
OFFSET

2,3

PROG

(PARI) for(i=2, 20, n=i*2+1:p=1:for(k=1, n, p=p*lcm(k, n+1-k)):print1((2*i+1)*(2*i)!/sqrtint(4*(i+1)*p)", "))

CROSSREFS

Cf. A082022.

Sequence in context: A113698 A048794 A164869 * A164857 A066700 A159323

Adjacent sequences:  A082289 A082290 A082291 * A082293 A082294 A082295

KEYWORD

nonn

AUTHOR

Ralf Stephan (ralf(AT)ark.in-berlin.de), Apr 08 2003

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Last modified February 15 15:20 EST 2012. Contains 205823 sequences.