23921

Appears in sequences

• Number of partitions satisfying cn(0,5) <= cn(2,5) + cn(3,5).at n=38A039840
• a(n) = a(1) + a(2) + ... + a(n-1) - a(m) for n >= 4, where m = n - 1 - 2^p and p is the unique integer such that 2^p < n - 1 <= 2^(p+1), starting with a(1) = a(2) = 1 and a(3) = 2.at n=16A049890
• Coefficient of x in the reduction by (x^2 -> x + 1) of the polynomial p(n,x) defined below at Comments.at n=10A192905
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 33", based on the 5-celled von Neumann neighborhood.at n=33A269812
• Number of 10-element subsets of [n] whose sum is a triangular number.at n=11A320856
• Number of distinct regions among all circles that can be constructed on vertices of an n-sided regular polygon, using only a compass.at n=19A359046