30391

Properties

Appears in sequences

• Number of bipartite partitions.at n=20A002762
• Compositions: 6th column of A048004.at n=13A006980
• a(1) = 1; a(n) = n^n mod (n-1)^(n-1) for n > 1.at n=6A066611
• Number of initial odd numbers in class n of the iterated phi function.at n=37A092878
• Primes of the form 9x^3 + x + 1.at n=4A114354
• Prime numbers p such that p^3 - (p-1)^2 and p^3 + (p-1)^2 are also primes.at n=34A137474
• Primes expressed as the sum of square of digits of all primes.at n=37A181508
• Numbers k such that (86*10^k + 121)/9 is prime.at n=24A283185
• Primorial base emirps: prime numbers whose primorial base reversal is a different prime.at n=25A333425
• Prime numbersat n=3284