63732

Appears in sequences

• a(n) = Sum_{k=0..n-2} T(n,k) * T(n,k+2), with T given by A026626.at n=7A026963
• Number of 4-step one space for components leftwards or up, two space for components rightwards or down asymmetric quasi-queen's tours (antidiagonal moves become knight moves) on an n X n board summed over all starting positions.at n=13A187859
• Numbers k such that 2^(k-1)*(2^k - 1) + 1 is prime (see A134169).at n=29A268692
• Divide the positive integers into subsets of lengths given by successive primes. a(n) is the sum of primes contained in the n-th subset.at n=40A344718