11552032628domain: NAppears in sequencesa(n) = ( 1/1 + 1/3 + 1/5 + ... + 1/(2*n-1) )*LCM(1, 3, 5, ..., 2*n-1).at n=13A025550Numerators of alternating sum transform (PSumSIGN) of Harmonic numbers H(n) = A001008/A002805.at n=26A035048Numerators of Sum_{j=0..n} 1/(2*j+1), for n >= 0.at n=13A350669