[seqfan] More Xmas presents (with digits)

[Eric Angelini]

S = 1,2,10,3,4,5,6,7,8,9,21,20,12,22,13,23,31,24,25,41,26,27,28,14,29,30,32,15,33,34,35,51,36,37,38,39,40,42,43,44,45,61,...
Draw a thin vertical stroke after each
"1". The quantity of digits between 
two strokes is given by S itself. To bild
S, always use the smallest integer not
yet present in S and not leading to a
contradiction.

T = 3,1,2,20,21,4,5,6,7,8,9,10,11,13,14,15,16,23,17,18,19,30,31,33,34,35,36,12,37,32,38,39,24,40,41,25,43,44,42,...
Same as above -- with "2".

... etc. -- with 3, 4, 5,... 9 and 0.
Best,
É.