283650

Appears in sequences

• a(n) = (n+1)^2*(n+2)*(2*n+3)/6.at n=29A108678
• Expansion of 30*x*(1 + x) / (1 - x)^4.at n=29A316459
• On a spirally numbered square grid, with labels starting at 0, this is the number of the last cell that a (1,n) leaper reaches before getting trapped, or -1 if it never gets trapped.at n=17A323472