230640

Appears in sequences

• a(n) = n^2*(n^2 - 1)/4.at n=31A006011
• a(n) = ((prime(n))^4-(prime(n))^2)/4.at n=10A138420
• Number of (w,x,y,z) with all terms in {0,...,n}, w even and x odd.at n=30A212766
• Number of n X 2 0..4 arrays of sums of 2 X 2 subblocks of some (n+1) X 3 binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=15A226988
• Numbers whose sum of proper square divisors is a palindrome in base 10 having at least two digits.at n=20A232892
• Numbers whose sum of square divisors is a palindrome in base 10 having at least two digits.at n=10A232893