18832

Appears in sequences

• Expansion of 1/((1+x)*(1-x)^6).at n=18A001753
• Reversion of x - x^2 - x^3 - x^4.at n=9A063018
• Number of partitions where the number of 1's and 2's are equal.at n=49A174455
• Number of 6-step one space leftwards or up, two space rightwards or down asymmetric rook's tours on an n X n board summed over all starting positions.at n=7A187301
• Number of 5-bead necklaces labeled with numbers -n..n allowing reversal, with sum zero and first and second differences in -n..n.at n=25A208972
• Number of n X 5 0..1 arrays with rows unimodal and columns nondecreasing.at n=9A225007
• Number of unimodal functions f:[n]->[2n].at n=5A226012
• Number A(n,k) of unimodal functions f:[n]->[k*n]; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=33A226031
• Number of (n+1) X (3+1) 0..3 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant-stress 1 X 1 tilings).at n=6A235293
• Number of (n+1) X (7+1) 0..3 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant-stress 1 X 1 tilings).at n=2A235297
• T(n,k) is the number of (n+1) X (k+1) 0..3 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant-stress 1 X 1 tilings).at n=38A235301
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 662", based on the 5-celled von Neumann neighborhood.at n=39A273390
• Number of nonnegative solutions to (x_1)^2 + (x_2)^2 + ... + (x_8)^2 <= n.at n=21A341403
• Numbers k such that k divides A243071(k).at n=30A364497
• Expansion of e.g.f. exp( x - LambertW(-2*x)/2 ).at n=5A372315