28710

Appears in sequences

• Numbers n with property that n+41, n^2+41 and n^3+41 are all primes.at n=15A175260
• Number of n X 2 arrays of the minimum value of corresponding elements and their horizontal, vertical or antidiagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..2 n X 2 array.at n=29A219680
• Numbers n such that (n, sigma(n), tau(n)) lies on a sphere with integral radius centered at the origin, i.e., n^2 + sigma(n)^2 + tau(n)^2 is a square.at n=5A243455
• Number of rooted highly irregular trees with n nodes.at n=32A259863
• a(n) is the number of regions into which three-dimensional Euclidean space is divided by n-1 planes parallel to each face of a regular tetrahedron with edge length n, dividing the edges into unit segments.at n=19A364401
• Expansion of (1/x) * Series_Reversion( x * (1 - x)^2 / (1 + x^3 / (1 - x)^3) ).at n=7A389550