49555

Appears in sequences

• a(n) = n*(n+1)*(8*n + 1)/6.at n=33A132124
• a(n) = (2*n+1)*(2*n+3)*(2*n+5)/3.at n=25A162540
• Number of zero-sum -n..n arrays of 4 elements with first and second differences also in -n..n.at n=35A201875
• Numbers k such that 2^k + 1 is divisible by the sum of its decimal digits.at n=18A333474
• a(n) = (-1)^n + 3 * Sum_{k=0..n-1} a(k) * a(n-k-1).at n=6A337169