41685

Appears in sequences

• a(1) = 7; a(n+1) = a(n)-th nonprime, where nonprimes begin at 1.at n=44A025006
• Engel expansion of zeta(8)=sum(i>0,1/i^8).at n=7A067916
• q-factorial numbers 3!_q.at n=34A069778
• Numbers k such that 4*k-1, 8*k-1, 16*k-1 and 32*k-1 are all primes.at n=24A101794
• Coefficient triangle of the denominators of the (n-th convergents to) the continued fraction 1/(w+2/(w+3/(w+4/... . Conjectured to equal unsigned version of A137286.at n=69A180048
• The number of permutations of length n sortable by 3 prefix reversals (in the pancake sorting sense).at n=35A228398
• Minimum sum of a nonnegative integer triple that takes n moves to reach a 0 component, where a move picks two components, subtracts the smaller from the larger, and doubles the smaller.at n=20A256001
• Numbers equidistant from twin prime pairs that are also equidistant from numbers equidistant from twin prime pairs.at n=36A260517
• Fourth column of the matrix of polynomial coefficients of the rational approximation to Mill's ratio.at n=4A263384
• Numbers that can be written as the sum of four or more consecutive squares in more than one way.at n=32A307937
• Numbers k such that A000081(k) is divisible by k.at n=9A336039
• a(n) = m is the least m = b*c > a(n-1) such that (b+c)*n = m-1 where 1 < b <= c < m.at n=33A364171