18161

Appears in sequences

• Numbers k such that k^6 == 1 (mod 7^5).at n=8A056103
• Theorems from propositional calculus, translated into decimal digits.at n=31A101273
• Numbers n such that (n + prime(n)), (n+1 + prime(n+1)), (n+2 + prime(n+2)) and (n+3 + prime(n+3)) are divisible by 5.at n=11A107582
• a(n) = floor(sqrt(2*n^5)).at n=44A172473
• Number of (w,x,y,z) with all terms in {1,...,n} and w<2x and y<3z.at n=13A212508
• Smallest number such that the sum of the digits of n * a(n) is greater than n.at n=48A269333
• Number of active (ON, black) cells at stage 2^n-1 of the two-dimensional cellular automaton defined by "Rule 646", based on the 5-celled von Neumann neighborhood.at n=7A273327
• Irregular triangle T(n,m), numerators of coefficients in a power/Fourier series expansion of the plane pendulum's exact time dependence.at n=26A274130
• Numbers that can be written in exactly two different ways as s_1^x_1 + ... + s_t^x_t, with 1 < s_1 < ... < s_t and {s_1,..., s_t} = {x_1,..., x_t} for some t > 0.at n=44A386966
• Number of integer partitions of n whose parts have choosable sets of strict integer partitions.at n=51A387178