52447

Appears in sequences

• Numbers k such that gcd(A001008(k), A001008(floor(k/2))) > 1.at n=6A126196
• Number of nX3 binary arrays indicating whether each 2X2 subblock of a larger binary array has lexicographically nondecreasing rows and columns, for some larger (n+1)X4 binary array with rows and columns of the latter in lexicographically nondecreasing order.at n=9A227253
• Expansion of 1/(g^2 * (2 - g^2)), where g = 1+x*g^2 is the g.f. of A000108.at n=8A391513