[seqfan] The a(n)th digit of the sequence is visible in a(n).

Eric Angelini Eric.Angelini at kntv.be
Thu Sep 25 23:37:15 CEST 2014


Hello SeqFans,

S=1,2,3,4,5,6,7,8,9,11,13,15,17,19,21,22,25,27,29,31,23,33,37,39,41,24,44,47,49,51,53,45,55,59,61,26,46,66,69,71,73,75,67,77,81,28,48,68,88,91,93,95,97,99,10,20,40,60,80,111,14,16,18,12,112,42,62,82,113,34,36,38,30,114,116,74,90,52,35,56,58,50,121,65,118,117,115,57,78,70,123,85,87,89,119,94,96,79,92,100,...

This is the lexico-first permutation of
the integers > 0 such that the a(n)th
digit of the sequence is visible in a(n).

Example (read from the present end of S):
- the 100st digit of S is 1
- the 92nd digit of S is 9
- the 79th digit of S is 7
- the 96th digit of S is 9, etc.

Best,
É.


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