47452

Appears in sequences

• Number of open Skolem sequences of order n.at n=11A222320
• Number of nX5 0..1 arrays with no element equal to a strict majority of its horizontal and vertical neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.at n=4A279131
• T(n,k)=Number of nXk 0..1 arrays with no element equal to a strict majority of its horizontal and vertical neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.at n=40A279134
• Numbers k such that (17*10^k - 179)/9 is prime.at n=22A283246
• a(n) = Sum_{k=1..n} floor(n/k)^n.at n=5A332469
• Square array T(n,k), n >= 1, k >= 1, read by antidiagonals downwards, where T(n,k) = Sum_{j=1..n} floor(n/j)^k.at n=60A344725
• Numbers k such that k + sopfr(k) is a cube.at n=31A389862