40984

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 25 ones.at n=24A031793
• Numbers n such that the numerator of Sum_{i=1..n} (1/i^2), in reduced form, is prime.at n=35A111354
• Number of n X 2 0..2 arrays with horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and rows and columns lexicographically nondecreasing.at n=30A229439
• Numbers k such that 3*R_k + 40 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=21A256606