80500

Appears in sequences

• Convolution of A000203 with itself.at n=54A000385
• a(n) = n*(n-1)*(n+1)*(3*n-2)/12.at n=23A153978
• Number of (w,x,y,z) with all terms in {1,...,n} and 2|w-x|>=n+|y-z|.at n=28A212688
• a(n) = 2*(3*n+1)*(9*n+8).at n=38A304506