31945

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 89.at n=32A020428
• Lexicographically earliest increasing sequence of positive integers such that A001222(a(i)+a(j)) = A001222(a(i)) + A001222(a(j)) for all 1<=i<j.at n=6A059363
• a(n) = 66*n^2 + 1.at n=22A158689
• Numbers k such that 36^k - 6^k - 1 is prime.at n=19A265484
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of e.g.f. B(x)^k, where B(x) is the e.g.f. of A384720.at n=49A384722
• a(n) = Sum_{k=0..floor(2*n/7)} binomial(2*k,2*n-7*k).at n=35A392430