260780

Appears in sequences

• Expansion of 1/((1-x)*(1-x^2))^4.at n=24A038164
• Expansion of (1+6*x+x^2)/(1-x)^8.at n=12A059600
• a(n) is the total number of elements in all sum-free subsets of {1,...,n}.at n=23A288888
• Triangle T(n,m) = (2*m*n+2*n-2*m^2+1)*C(2*n+2,2*m+1)/(4*n+2).at n=49A338523
• Triangle T(n,m) = (2*m*n+2*n-2*m^2+1)*C(2*n+2,2*m+1)/(4*n+2).at n=50A338523