25204

Appears in sequences

• Number of compositions of n where differences between neighboring parts are in {-1,1}.at n=47A173258
• a(n) = 4*(5*n^2 - 5*n + 1).at n=35A193448
• Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2*w^2 < x^2 + y^2.at n=35A211800
• Expansion of Sum_{0<i<j<k<l} q^(2*(i+j+k+l)-4)/( (1-q^(2*i-1))*(1-q^(2*j-1))*(1-q^(2*k-1))*(1-q^(2*l-1)) )^2.at n=29A365666
• G.f. satisfies A(x) = 1 + x^2*A(x)^5 / (1 - x*A(x)).at n=11A365691
• Expansion of e.g.f. 3*exp(-x) / (4 - exp(3*x)).at n=6A368455