139642

Appears in sequences

• Number of (n+1)X(3+1) 0..1 arrays with each row and column prime, read as a binary number with top and left being the most significant bits.at n=11A261756
• p-INVERT of (0,1,0,1,0,1,...), where p(S) = 1 - 2 S - 2 S^2.at n=10A291228
• Consider the figure made up of a row of n adjacent congruent rectangles, with diagonals of all possible rectangles drawn; a(n) = number of interior vertices where exactly two lines cross.at n=33A334701