34545420

Appears in sequences

• Write cosec x = 1/x + Sum e_n x^(2n-1)/(2n-1)!; sequence gives denominators of e_n.at n=17A036283
• a(n) = n * A002445(n).at n=18A228838
• a(n) = denominator(4^(n + 1)*zeta(-n, 1/4)).at n=35A344918