158741

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={-1,1}.at n=23A080005
• Number of 2 X 2 matrices M with all terms in {1,...,n} and permanent(M) >= n.at n=20A212240
• a(n) is the smallest number that is the sum of both 2n-1 and 2n+1 consecutive primes.at n=35A213174