1365336

Appears in sequences

• Totient of 2^n+1.at n=21A053285
• Number of n X 3 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.at n=3A269271
• T(n,k)=Number of nXk 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.at n=18A269276
• Number of 4Xn 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.at n=2A269279
• a(n) = phi(8^n+1), where phi is Euler's totient function (A000010).at n=7A366658