A081349 Square maze arrangement of the natural numbers, read by antidiagonals.
1, 2, 8, 3, 7, 9, 4, 6, 10, 24, 15, 5, 11, 23, 25, 16, 14, 12, 22, 26, 48, 35, 17, 13, 21, 27, 47, 49, 36, 34, 18, 20, 28, 46, 50, 80, 63, 37, 33, 19, 29, 45, 51, 79, 81, 64, 62, 38, 32, 30, 44, 52, 78, 82, 120, 99, 65, 61, 39, 31, 43, 53, 77, 83, 119, 121, 100, 98, 66, 60, 40
Offset: 0
Examples
Starting with 1,2,3,4, turn (LL) and then repeat (RRR)(LLL) to get: . 1 8---9 24 ... | | | | 2 7 10 23 ... | | | | 3 6 11 22 ... | | | | 4---5 12 21 ... | | 15--14--13 20 ... | | 16--17--18--19 ... ...