2113020

Appears in sequences

• Even order Taylor coefficients at x = 0 of exp( (sqrt(2)-sqrt(-2*x^2+2))/(-2*x^2+2)^(1/2) ), odd order coefficients being equal to zero.at n=4A081021
• Number of (n+2)X3 binary arrays avoiding patterns 000 and 010 in rows, columns and nw-to-se diagonals.at n=8A202485
• G.f.: x^2 * f''(x), where f(x) = Product_{k>=1} 1 / (1 - x^k).at n=27A278406