133672

Appears in sequences

• Stirling numbers of the first kind: s(n+2, n).at n=31A000914
• Floor(1/{(9+n^4)^(1/4)}), where {} = fractional part.at n=66A184633
• Ordered Stirling numbers S1(n,k) >= 0.at n=42A193245
• Number of distinct intersections among all circles that can be constructed on vertices of an n-sided regular polygon, using only a compass.at n=30A331702
• T(n,k) = Sum_{j=1..n} 2^j*binomial(2*n-2*j, n-j)*binomial(n+j, n)*binomial(j, k), triangle read by rows (n >= 0 and 0 <= k <= n).at n=21A335183