1855967520domain: NAppears in sequencesBinomial coefficients C(2n, n-2).at n=15A002694Binomial coefficient C(34,n).at n=15A010950Binomial coefficient C(34,n).at n=19A010950a(n) = binomial(n,15).at n=19A010968a(n) = binomial(n,19).at n=15A010972T(2n+4,n), array T as in A050186; a count of aperiodic binary words.at n=15A051197