151473214816domain: NAppears in sequencesBinomial coefficient C(4n,n-6).at n=10A004336Binomial coefficients C(n,54).at n=10A017718Binomial coefficients C(64,n).at n=10A017780Weight enumerator of [64,63,2] Reed-Muller code RM(5,6).at n=5A110851a(n) = [x^n] 1/(1 - x)^(n*(n+1)/2).at n=10A386880