-2505

Appears in sequences

• Table 1 on page 46 in the Witten reference.at n=15A122505
• Expansion of 1 - 3*(1-x-sqrt(1-2*x-3*x^2))/2.at n=11A168076
• Values of n such that L(11) and N(11) are both prime, where L(k) = (n^2+n+1)*2^(2*k) + (2*n+1)*2^k + 1, N(k) = (n^2+n+1)*2^k + n.at n=45A227449
• a(n) = Sum_{k=0..floor(n/2)} (-1)^k * binomial(n-k,k) * Catalan(k).at n=17A360024