-21320

Appears in sequences

• Expansion of (1-x)/(1+2*x+x^2+x^3).at n=17A078065
• A triangle sequence derived from setting an Euler numbers A122045 generalization equal to the Eulerian numbers A008292 to get a generating function expansion: p(x,t) = ((-1 + exp(x)) (-1 + x)/(-1 + exp(t*x) + t - exp(t)* x)).at n=43A178232