1043119

Appears in sequences

• a(n) = number of (s(0), s(1), ..., s(2*n-1)) such that s(i) is a nonnegative integer and |s(i) - s(i-1)| = 1 for i = 1,2,...,n, s(0) = 3, s(2*n-1) = 6. Also a(n) = T(2*n-1,n-2), where T is defined in A026022.at n=10A026027
• Partial sums of A051880.at n=18A050406
• a(n) = n*(n-1)*(2*n+1)*(2*n-1)*(2*n-3)*(10*n-17)/90.at n=11A185375
• Numerators of partial products of a Hardy-Littlewood constant.at n=11A191998