62707domain: NAppears in sequencesa(n) = [ C(2n,n)/2^(n+3) ].at n=22A024506Expansion of 1/(x^k*(1-x-2*x^(k+1))) for k=8.at n=41A143451Number of binary n-sequences ending in 1 with exactly one more occurrence of 11 than 10.at n=20A376884E.g.f. A(x) satisfies A(x) = exp( x*A(x)*(A(x) + A(-x))/2 ).at n=6A385690