2268783825

Appears in sequences

• Numerators in expansion of 1/sqrt(1-x).at n=18A001790
• Coefficients of Legendre polynomials.at n=17A002461
• Least integer having Radon random number n.at n=33A002661
• Numerator of n!!/(n+1)!! (cf. A006882).at n=35A004730
• Numerators of Taylor series expansion of arcsin(x). Also arises from arccos(x), arccsc(x), arcsec(x), arcsinh(x).at n=18A055786
• Numerator of probability that there is no error when average of n numbers is computed, assuming errors of +1, -1 are possible and they each occur with p = 1/4.at n=9A061548
• Divide n! repeatedly by i! for i from floor(n/2) down through 2; a(n) = remaining quotient.at n=35A111866
• Numerators of coefficient of x^(n+1/2) in the series expansion of the haversine.at n=18A143581
• Denominators of the BG1[ -5,n] coefficients of the BG1 matrix.at n=18A162444
• Odd part of the swinging factorial A056040.at n=36A163590
• One half of a trisection of A001700: binomial(6n+5,3(n+1))/2, n >= 0.at n=5A187366
• A trisection of A001405 (central binomial coefficients): binomial(3n+2,floor((3n+2)/2))/2, n >= 0.at n=11A187444
• Matching number of the n-odd graph.at n=17A301560
• a(n) = floor(binomial(n-1, floor((n-1)/2))/2).at n=33A366108
• a(n) = denominator(n!! / (n - 1)!!).at n=36A380910