39671305740domain: NAppears in sequencesCoefficients of Legendre polynomials.at n=15A001801Apéry numbers: n*C(2*n,n).at n=17A005430a(n) = n!/([(n-1)/2]!*[(n+1)/2]!) for n>0, a(0)=0, and where [ ] = floor.at n=34A212303