41480

Appears in sequences

• Numbers whose base-4 representation contains exactly four 0's and four 2's.at n=27A045061
• Number of Pythagorean quadruples mod n; i.e., number of solutions to w^2 + x^2 + y^2 = z^2 mod n.at n=33A096018
• Number of (w,x,y) with all terms in {0,...,n} and |w-x| + |x-y| != w+x+y.at n=34A213480
• Principal diagonal of the convolution array A213844.at n=19A213845
• Number of solutions to x^2 + y^2 + z^2 + t^2 == n (mod 2*n) for x,y,z,t in [0, 2*n).at n=16A229294
• Number of non-congruent solutions of x^2 + y^2 + z^2 + t^2 == 0 mod n.at n=33A240547
• a(n) = 36*n^2 - 4*n (n>=1).at n=33A304380
• Number of non-congruent solutions of x^2+y^2 == z^2+w^2 (mod n).at n=33A316148
• Number of positive solutions to (x_1)^2 + (x_2)^2 + (x_3)^2 + (x_4)^2 <= n^2.at n=18A341423