Pair of digits self-differences
Eric Angelini
keynews.tv at skynet.be
Thu Feb 3 13:47:14 CET 2005
Could someone compute two dozen more terms ? I would like
to check if my seq. is ok before submitting it again to the
OEIS -- after a few tries with a lot of mistakes...
1 20 21 102 103 200 201 211 250 255 330 2000 10201 10206 11102
1) a(n) < a(n+1) and
2) the n-th digit of the sequence is the absolute difference of
the digits forming the n-th pair of digits of the seq.
Example :
- 1st pair of dig. of seq.A is [12];
- abs. diff. of it's dig. is 1 [2-1];
- this 1 is the 1st dig. of seq.A.
- 2nd pair of dig. of seq.A is [02];
- abs. diff. of it's dig. is 2 [2-0];
- this 2 is the 2nd dig. of seq.A.
- 3rd pair of dig. of seq.A is [11];
- abs. diff. of it's dig. is 0 [1-1];
- this 0 is the 3rd dig. of seq.A.
- 4th pair of dig. of seq.A is [02];
- abs. diff. of it's dig. is 2 [2-0];
- this 2 is the 4th dig. of seq.A.
...
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