Start with sequence of nonnegative integers; then swap L(k) and U(k) for all k >= 1, where L = A000201, U = A001950 (lower and upper Wythoff sequences).
0, 2, 1, 5, 7, 3, 10, 4, 13, 15, 6, 18, 20, 8, 23, 9, 26, 28, 11, 31, 12, 34, 36, 14, 39, 41
2 seqfan posts
Fri Nov 4 13:07:07 CET 2011 [seqfan] Re: A002251 rediscovered as "home-sick queens"