60049

Appears in sequences

• a(n) = 3^n + n^3.at n=10A001585
• Leyland numbers: 3, together with numbers expressible as n^k + k^n nontrivially, i.e., n,k > 1 (to avoid n = (n-1)^1 + 1^(n-1)).at n=28A076980
• Smallest k such that for 0 <= i < n, 1+i+n*(n-1)/2 divides k-i.at n=4A091797
• Least j > 1 such that j^2 = (4*n^2 + 2)*(k^2) + (4*n^2 + 2)*k + 1.at n=24A106231
• Expansion of c(x^2+x^3), c(x) the g.f. of A000108.at n=18A115178
• Numbers of the form x^y + y^x, 1 < x < y.at n=23A173054
• a(n) = 10^n + n^10.at n=3A177068
• G.f. A(x) satisfies: A(x) = 1 + x + x^2 * A(x/(1 + 6*x)) / (1 + 6*x).at n=8A351187
• Numbers that can be written as s^x + t^y, with 1 < s < t and {s,t} = {x,y}; that is, are of the form s^s + t^t or s^t + t^s.at n=33A385232