351780

Appears in sequences

• First differences of (n+1)^5-n^5.at n=25A068236
• a(1)=1; thereafter, a(n+1) = 20*n^3 + 10*n.at n=26A101098
• Areas of 'close-to-equilateral' integer triangles.at n=4A102341
• Area of (a,a,a+1)-integer triangle. Corresponding a's are in A103974.at n=3A104009
• Number of n X 6 0..1 arrays avoiding 0 0 0 and 0 0 1 horizontally and 0 1 1 and 1 1 1 vertically.at n=18A208778
• Triangle T(n,k) read by rows (n >= 0, k >= 0) with g.f. 1/(1 - f(0)*x - x*y/(1 - f(1)*x - x*y/(1 - f(2)*x - x*y/(1 - f(3)*x - x*y/(1 - f(4)*x - x*y/(1 - ...)))))) where f(n) = n + 1 for n >= 0.at n=52A383019