-12810

Appears in sequences

• Triangle read by rows: T(n, k) = (-2)^k*binomial(n, k)*Euler(k, 1/2).at n=61A081658
• Exponential Riordan array (sech(x),x).at n=59A119879
• Nonzero coefficients of the Swiss-Knife polynomials for the computation of Euler, tangent, and Bernoulli numbers (triangle read by rows).at n=33A153641
• a(n) = Sum_{k=0..floor(n/3)} Stirling1(n,3*k).at n=8A357834