38497

Appears in sequences

• a(n) is the number of terms in the expansion of (x+y+z)*(x^2+y^2+z^2)*(x^3+y^3+z^3)*...*(x^n+y^n+z^n).at n=22A086796
• Quartan semiprimes: semiprimes of the form x^4 + y^4, x>0, y>0.at n=26A182277
• a(n) = (a(n-1) + a(n-3))/gcd(a(n-1), a(n-3)) with a(0) =2, a(1) = 3, a(2) = 5.at n=64A214331
• Number of commuting 4-tuples of elements from S_n, divided by n!.at n=9A226313
• Numbers k for which rank of the elliptic curve y^2=x^3-k*x is 4.at n=27A309034
• The number of vertices inside a hexagon formed by the straight line segments mutually connecting all vertices and all points that divide the sides into n equal parts.at n=5A330846
• Table read by antidiagonals: Place k equally spaced points on each side of a regular n-gon and join every pair of the n*(k+1) boundary points by a chord; T(n,k) (n >= 3, k >= 0) gives the number of vertices in the resulting planar graph.at n=39A367322