99540

Appears in sequences

• G.f. satisfies A(x) = 1 + x*cycle_index(G,A(x)) where G = cyclic group of order 23 generated by (1,2,...,23).at n=7A036733
• Number of polyhexes with n cells that tile the plane both by translation and by 180-degree rotation (Conway criterion).at n=16A075209
• Largest possible z-value of an integer solution (x,y,z) to 4/n = 1/x + 1/y + 1/z satisfying 0 < x < y < z. The x and y components are in A075245 and A075246.at n=32A075247
• Numbers k such that phi(k-1) + phi(k+1) = sigma(k)/2.at n=6A076648
• z-value of the lexicographically first solution (x,y,z) of 4/n = 1/x + 1/y + 1/z with 0 < x < y < z all integers, or 0 if there is no such solution. Corresponding x and y values are in A257839 and A257840.at n=34A257841
• 3^n with digits rearranged into nonincreasing order.at n=10A321539
• Numbers k such that N = k^6 is a twin rank (cf. A002822: 6N +- 1 are twin primes).at n=24A326236
• G.f. = Phi*F^5, where Phi = g.f. for A028930, F = g.f. for A028959.at n=19A328536
• Ulam numbers that are oblong (or promic) numbers.at n=25A379828