[seqfan] A220952 "unkn" (author Don Knuth, Feb 20, 2013) - continuation?

[Georg.Fischer]

Dear Neil, dear SeqFans,

It seems to me that sequence A220952 never has received any comment.
Maybe Neil knows more.

I think that a(n=0..125) should read:
1, 2,3,4,9, 14,19,18,17,16,11,12,13,8,7,6,5,10,15,20,21,22,23,24,
49,74,99,98,97,96,95,90,85,80,81,82,83,88,87,86,91,92,93,94,89,84,79,78,77,76,51,
52,53,54,59,64,69,68,67,66,61,62,63,58,57,56,55,60,65,70,71,72,73,48,47,46,45,40,
35,30,31,32,33,38,37,36,41,42,43,44,39,34,29,28,27,26,25,50,75,100,101,102,103,104,
109,114,119,118,117,116,111,112,113,108,107,106,105,110,115,120,121,122,123,124, 

249

Please have a look at my page
<http://www.teherba.org/index.php/OEIS/A220952> where
you find some explanations and links to the plots which
show letter "Z" shaped structures in kind of "fractal"
nesting.

I do not dare to add a comment to the sequence until
somebody finds this reasonable. If my continuation is
the desired one, I would of cause be very interested in
additional interpretations.

Best regards - Georg Fischer