51458

Appears in sequences

• a(n) = 2^n * Product_{k=1..(n-1)/2} (2 + 3*cos(k*Pi/n)^2).at n=9A152120
• Number of binary strings of length n with no substrings equal to 0000 0010 or 1101.at n=20A164424
• Number of (n+1) X 3 0..2 arrays with every 2 X 2 subblock having the same number of equal diagonal or antidiagonal elements, and new values 0..2 introduced in row major order.at n=4A205355
• Number of (n+1)X6 0..2 arrays with every 2X2 subblock having the same number of equal diagonal or antidiagonal elements, and new values 0..2 introduced in row major order.at n=1A205358
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having the same number of equal diagonal or antidiagonal elements, and new values 0..2 introduced in row major order.at n=16A205361
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with every 2X2 subblock having the same number of equal diagonal or antidiagonal elements, and new values 0..2 introduced in row major order.at n=19A205361
• Number of solutions to 1^3*k_1 + 2^3*k_2 + ... + n^3*k_n = 1, where k_i are from {-1,0,1}, i=1..n.at n=19A369735