40284

Appears in sequences

• Convolution of the lower and upper Wythoff sequences (A000201 and A001950).at n=37A023664
• Triangular array read by rows: a(n,k) = Sum_{d|k} mu(d)*U(n,k/d)/n if k|n else 0, where U(n,k) = A047916(n,k) (1<=k<=n).at n=44A047919
• Difference between the product of numbers up to n and the sum of numbers up to n.at n=7A076128
• a(n) = n! - (n-2)^2.at n=7A127065
• Triangular array, T(n,k) = s(n,k) + s(n,n-k), where s(n,k) are the Stirling numbers of the first kind.at n=46A154843
• Triangular array, T(n,k) = s(n,k) + s(n,n-k), where s(n,k) are the Stirling numbers of the first kind.at n=53A154843
• Number of lattice paths from (0,0) to (n,n) using steps (1,0), (2,0), (0,2), (1,1).at n=8A192368
• Number of nondecreasing sequences of n 1..6 integers with no element dividing the sequence sum.at n=39A212866
• Number of partitions of n such that (number parts having multiplicity 1) is a part or (number of 1s) is a part.at n=42A241510
• Number T(n,k) of reduced decompositions for all permutations of [n] with exactly k inversions; triangle T(n,k), n>=0, 0<=k<=n*(n-1)/2, read by rows.at n=36A289778
• Least number k such that the arithmetic derivatives of the composite numbers k-n and k+n are equal.at n=28A296341
• Number of cyclic permutations of [n] with symmetry order s=1.at n=8A325956
• Number of regions in a regular n-gon with all diagonals drawn whose edges all have a different number of facing edges.at n=51A350718
• Indices where the cumulative sum of cos(2k+1)^(2k+1) reaches a record high value.at n=32A389559