87885

Appears in sequences

• Powers of fifth root of 20 rounded to nearest integer.at n=19A018172
• Powers of fifth root of 20 rounded up.at n=19A018173
• a(n) = T(n,n-5), array T as in A055807.at n=32A055810
• Numbers k such that k and k^2 use only the digits 2, 3, 5, 7 and 8.at n=11A137083
• Numbers n such that the decimal digits of n^2 are all prime.at n=24A275971
• Number of 9-element subsets of [n] whose sum is a triangular number.at n=15A320855
• Number of ways to place a non-attacking black king and white king on an n X n board, up to rotation and reflection.at n=29A357723
• G.f. satisfies A(x) = 1 + x*A(x)*(1 + 2*A(x)^3).at n=5A364431