151959
domain: N
Appears in sequences
- Numbers m such that m divides 10^m - 1.at n=27A014950
- Numbers k such that k | 11^k + 1.at n=35A015960
- a(n) = 3*n^3.at n=37A117642
- The average of prime factors of n and n+1 is the same.at n=23A227755
- a(n) = 2^n * Sum_{k=0..n} k^p*q^k, where p=3, q=-1/2.at n=21A232604
- Numbers k not divisible by 9 such that k divides 10^k - 1 (A014950).at n=4A232769
- a(n) is the smallest number k in the sorted sequence S(q) = {k : rad(k) = q}, q = A120944(n), such that tau(k) - A008479(k) is not positive, where rad = A007947 and tau = A000005.at n=39A373737