89667
domain: N
Appears in sequences
- Odd numbers divisible by exactly 8 primes (counted with multiplicity).at n=32A046321
- Primitive numbers k that divide sigma(k)*phi(k).at n=18A055196
- Square root of n has the same nonzero digit in each of the first 4 places to the right of the decimal point.at n=36A073585
- a(n) = 81*n^2 - 118*n + 43.at n=34A156677
- a(n) = n^7*(n^4 + 1)/2.at n=3A168661
- Odd numbers k such that rad(k) divides sigma(k).at n=11A336554
- Numbers k that divide Sum_{j|k} j^(k/j).at n=30A343982
- a(n) is the (n-1)-st frugal number in base n.at n=41A379539