-1479

Appears in sequences

• a(n)=det(M_n) where M_n is the n X n matrix m(i,j)=1 if sigma(i+j) is even, 0 otherwise.at n=20A096734
• a(n) = (5*2^(n+2) - 3*n*2^n - 2*(-1)^n) / 18.at n=11A139790
• Hankel transform of expansion of 1/c(x)^3, c(x) the g.f. of A000108.at n=15A144701
• a(n) = (-1)^n*n*(n+1)*(2*n-5)/6.at n=16A167386
• Expansion of (1+4*x+x^2) / ((1-x)^3*(1+x)^4).at n=32A229834
• Difference between sums of quadratic residues and non-residues modulo n (residues are not necessarily coprime to n).at n=86A255644
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 339", based on the 5-celled von Neumann neighborhood.at n=21A271292
• First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 433", based on the 5-celled von Neumann neighborhood.at n=27A272148
• Expansion of Product_{k>=0} 1/(1 + x^(3*k+2))^(3*k+2).at n=25A285310