48776
domain: N
Appears in sequences
- Number of ways to place a non-attacking white and black king on n X n chessboard.at n=14A035286
- Numbers n such that reverse(n) = phi(n) (mod n).at n=13A072392
- a(n) = Sum_{i=1..n} i^2*t(i), where t = A000217.at n=12A086689
- Numbers k such that phi(k) = reversal(k)-k.at n=4A115926
- Number of nX2 arrays of permutations of 0..n*2-1 with each element moved a city block distance of 0 or 3.at n=8A263440
- Expansion of 1/(1 - Sum_{k>=1} x^k/(1 - x^(2*k))).at n=15A320650
- Dirichlet g.f.: (zeta(s-3) / zeta(s))^2.at n=28A338165