21124

Appears in sequences

• Number of rooted identity matched trees with n nodes.at n=8A005753
• a(n) = floor(surface area of a sphere with radius n).at n=40A066644
• a(n) = sum of n-th column in array in A100452.at n=28A100454
• Conjectured positive numbers which have more than one representation (m,s) as a difference s^2 - m^5, m >= 1, s > 0.at n=40A177770
• a(n) = 4*(5*n^2 - 5*n + 1).at n=32A193448
• Number of partitions p of n such that the multiplicity of (max(p) - min(p)) is a part.at n=48A240495
• Number A(n,k) of rooted identity trees with n nodes and k-colored non-root nodes; square array A(n,k), n>=0, k>=0, read by antidiagonals.at n=75A255517
• Least number k such that (k^2+1) mod s = prime(n) where s is the sum of the distinct primes dividing k^2+1, or 0 if no such k exists.at n=45A272175
• Nearest integer to 4*Pi*n^2.at n=41A322615