131178

Appears in sequences

• Number of permutations of length n which avoid the patterns 1234, 1243, 3421.at n=16A116762
• a(n) is the end square spiral number for a knight starting on square n moving on a board with squares numbered with the square of their distance from the 0-square origin and where the knight moves to the smallest numbered unvisited square; the smallest spiral number ordering is used if the distances are equal.at n=8A326931