[seqfan] 0-additive and first differences

[Eric Angelini]

Hello SeqFans,
This is (I hope) the lexico-first 0-additive seq such that
sequence and first differences list all positive numbers 
exactly once:

   S = 1, 3, 7, 12, 18, 26, 17, 28, 41, 51, 37, 22, 47, ...
diff    2  4   5   6   8   9  11  13  10  14  15  25

Best,
É.