313880

Appears in sequences

• Numbers n such that 1 - Sum{k=1..n/2} A001223(2k-1)*(-1)^k = 0.at n=26A130643
• Numbers n such that 1 - S(n) = 0, where S(n) = (S(n-1) + A000040(n))*(-1)^n; S(0)=0, n=>1.at n=32A131197
• Number of 6 X 6 arrays of squares of integers, symmetric about main diagonal, with all rows summing to n.at n=19A156388
• Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 19.at n=3A156470