22611

Appears in sequences

• Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=2, r=3, I={1}.at n=14A080010
• Numbers n such that 3*10^n + 2*R_n - 1 is prime, where R_n = 11...1 is the repunit (A002275) of length n.at n=13A102966
• Apocalypse primes: 10^665+a(n) has 666 decimal digits and is prime.at n=12A115983
• a(0)=0, a(1)=1, a(n) = ( (a(n-1)+a(n-2)) XOR n) + n.at n=19A182506
• The n-th number m such that a nontrivial prime(n)-th root of unity modulo m exists.at n=36A305828
• a(n) is the minimum positive integer k such that the concatenation of k, a(n-1), a(n-2), ..., a(2), and a(1) is the lesser of a pair of twin primes (i.e., a term of A001359), with a(1) = 11.at n=44A350246