20257
domain: N
Appears in sequences
- Powers of sqrt(17) rounded to nearest integer.at n=7A017956
- Powers of sqrt(17) rounded up.at n=7A017957
- Powers of fourth root of 17 rounded to nearest integer.at n=14A018094
- Powers of fourth root of 17 rounded up.at n=14A018095
- Nearest integer to n^(7/2).at n=17A036489
- Numbers n such that phi(2n+1) = sigma(n).at n=43A067229
- Index of the first occurrence of prime(n) in A060324.at n=37A078454
- Column 5 of triangle A091602.at n=44A091608
- Numbers k such that 13k = 6j^2 + 6j + 1.at n=32A106390
- a(n) = 3*a(n-1) - 2*a(n-2) - a(n-3) + a(n-4) with n>3, a(0)=1, a(1)=2, a(2)=3, a(3)=7.at n=18A131300
- Numbers n such that there is an integer k with the property that k^tau(n) = sigma(n).at n=15A225239
- Solutions of the equation (n+2)' = (n+1)' + n', where n' is the arithmetic derivative of n.at n=2A241214
- Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 449", based on the 5-celled von Neumann neighborhood.at n=32A272254
- Row sums of the Sheffer triangle (exp(x), exp(3*x)-1) given in A282629.at n=5A284859