117194

Appears in sequences

• Meandric numbers for a river (or directed line) crossing two perpendicular roads at n points, beginning in the (-,-) quadrant and ending in the (+,+) quadrant if n even, in the (+,-) quadrant if n odd.at n=13A076906
• Meandric numbers for a river (or directed line) crossing two perpendicular roads at n points, beginning in the (-,-) quadrant, crossing x axis first and ending in any quadrant.at n=13A077551
• Number of integers in n-th generation of tree T(3/4) defined in Comments.at n=57A274146
• a(n) = (n^2 + 1) * (2*n - 1).at n=38A290631