139484

Appears in sequences

• a(n) = the number of values of k <= 10^n such that sqrt(k*(k+1)*(k+2)*(k+3)+1) is prime.at n=6A115366
• Number of permutations s_1,s_2,...,s_n of 1,2,...,n such that for all j=1,2,...,n, Sum_{i=1..j} s_i divides Product_{i=1..j} s_i.at n=21A291551
• Number of chiral pairs of color patterns (set partitions) in a cycle of length n using 6 or fewer colors (subsets).at n=11A320746