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 A002461 Coefficients of Legendre polynomials. (Formerly M3072 N1246) 0
 1, 3, 20, 35, 126, 231, 3432, 6435, 24310, 46189, 352716, 676039, 2600150, 5014575, 155117520, 300540195, 1166803110, 2268783825, 17672631900, 34461632205, 134564468610, 263012370465, 4116715363800, 8061900920775, 31602651609438, 61989816618513, 486734856412028 (list; graph; refs; listen; history; text; internal format)
 OFFSET 2,2 REFERENCES A. Fletcher, J. C. P. Miller, L. Rosenhead and L. J. Comrie, An Index of Mathematical Tables. Vols. 1 and 2, 2nd ed., Blackwell, Oxford and Addison-Wesley, Reading, MA, 1962, Vol. 1, p. 362. G. PrÃ©vost, Tables de Fonctions SphÃ©riques. Gauthier-Villars, Paris, 1933, pp. 156-157. N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence). N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). LINKS FORMULA 1 if n=2, n * |A002596(n)| else. - Ralf Stephan, Sep 01 2003 PROG (PARI) a(n) = if (n==2, 1, n*abs(numerator((1/(1-2*n))*binomial(2*n, n)/(4^n)))); \\ Michel Marcus, Feb 02 2015 CROSSREFS Sequence in context: A109218 A053748 A075358 * A254501 A031106 A248818 Adjacent sequences:  A002458 A002459 A002460 * A002462 A002463 A002464 KEYWORD nonn AUTHOR EXTENSIONS More terms from Michel Marcus, Feb 02 2015 STATUS approved

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Last modified December 13 17:34 EST 2018. Contains 318086 sequences. (Running on oeis4.)