86879

Appears in sequences

• Number of partitions of n such that either both floor(n/2) and ceiling(n/2) are parts or else neither is a part.at n=44A238624
• Number of integers m in [0..10^n-1] such that m has no digit in common with the last n digits of either m^2 or m^3.at n=15A256714
• a(n) = Sum_{k=1..n} k^2*phi(k), where phi is the Euler totient function A000010.at n=26A319087