275805

Appears in sequences

• Number of not-necessarily-symmetric n X 2 crossword puzzle grids.at n=13A034182
• Values of k such that {s(1),...,s(k)} is a palindrome, where {s(1),s(2),...} is the fixed point of the substitutions 0->1 and 1->110.at n=26A098894
• Indices of the smallest of four consecutive triangular numbers summing up to a square.at n=6A202391
• Number of ways to place 5 points on a triangular grid of side n so that no three of these points are vertices of an equilateral triangle of any orientation.at n=5A240442