215880

Appears in sequences

• Denominators of continued fraction convergents to sqrt(899).at n=7A042739
• Number of primes <= 12^n.at n=6A058248
• G.f.: 1/B(x) where B(x) = g.f. for A072964.at n=25A073420
• Chebyshev polynomial of the second kind U(3,n).at n=30A144138
• Number of (n+1)X3 0..2 arrays with no 2X2 subblock diagonal sum less antidiagonal sum equal to any horizontal or vertical neighbor 2X2 subblock diagonal sum less antidiagonal sum.at n=2A185849
• Number of (n+1)X4 0..2 arrays with no 2X2 subblock diagonal sum less antidiagonal sum equal to any horizontal or vertical neighbor 2X2 subblock diagonal sum less antidiagonal sum.at n=1A185850
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock diagonal sum less antidiagonal sum equal to any horizontal or vertical neighbor 2X2 subblock diagonal sum less antidiagonal sum.at n=7A185856
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock diagonal sum less antidiagonal sum equal to any horizontal or vertical neighbor 2X2 subblock diagonal sum less antidiagonal sum.at n=8A185856