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A014510 Floor( GAMMA(n+1/2) ). 3
1, 0, 1, 3, 11, 52, 287, 1871, 14034, 119292, 1133278, 11899423, 136843365, 1710542068, 23092317922, 334838609873, 5189998453040, 85634974475162, 1498612053315336, 27724322986333718, 540624298233507504 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

REFERENCES

M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, Tenth Printing, 1972, p. 255.

LINKS

Table of n, a(n) for n=0..20.

M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].

M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, Tenth Printing, 1972, p. 255.

FORMULA

a(n)=floor((2n-1)!!/2^n*sqrt(Pi)) where (2n-1)!!=prod(k=1, n, 2*k-1); asymptotically a(n)=n!/sqrt(n)*(1-1/(8n)+1/(128n^2)-5/(1024n^3)+O(1/n^4)) - Benoit Cloitre, Apr 29 2003

MAPLE

seq(floor(evalf(GAMMA(n+1/2), 100)), n=0..24);

CROSSREFS

Sequence in context: A319155 A292927 A179322 * A058799 A054362 A129833

Adjacent sequences:  A014507 A014508 A014509 * A014511 A014512 A014513

KEYWORD

nonn

AUTHOR

Simon Plouffe

STATUS

approved

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Last modified May 27 02:54 EDT 2019. Contains 323597 sequences. (Running on oeis4.)