62648

Appears in sequences

• Numbers k such that prime(2*k) - prime(k) == 0 (mod k).at n=15A066894
• Sum of neighbor maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their horizontal and vertical neighbors in a random 0..3 nX4 array.at n=3A220803
• T(n,k)=Sum of neighbor maps: number of nXk binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their horizontal and vertical neighbors in a random 0..3 nXk array.at n=24A220805
• Number of endless self-avoiding walks of length n for the union jack lattice.at n=5A334332
• Expansion of o.g.f. (1-x)^5/((1-x)^5 - x^4).at n=17A368475
• a(n) = Sum_{k=0..floor(n/2)} binomial(k+1,2*n-4*k+1).at n=38A392489