269045

Appears in sequences

• a(n) = Sum_{0 <= i < j <= n} (prime(j) - prime(i))^2, where prime(0) = 1.at n=20A024526
• Number of nXnXn 0..6 triangular arrays with each element x equal to the number its neighbors equal to 2,1,1,0,1,0,0 for x=0,1,2,3,4,5,6.at n=5A197853