56967

Appears in sequences

• Sum along upward diagonal of Pascal triangle from halfway point.at n=24A010759
• a(n) = T(2*n, n+3), T given by A027935.at n=6A027939
• Partial sums of A053739.at n=12A053295
• a(1) = 2; a(n) = half of the a(n-1)-th even nontotient number.at n=12A072416
• a(n) = Sum_{i=0..n} binomial(2n+i,2i).at n=6A108082
• Number of 7-step S, E, and NW-moving king's tours on an n X n board summed over all starting positions.at n=16A187512
• Positive integers n such that prime(n+i) is a primitive root modulo prime(n+j) for any distinct i and j among 0, 1, 2, 3.at n=8A243839