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A126968 First digit of a(n) is the a(n)-th digit of S [a(n+1) is the smallest available integer not yet present in S]. 3

%I #17 Jan 24 2015 11:45:18

%S 0,1,2,3,4,5,6,7,8,9,11,12,13,21,14,31,22,15,16,41,32,17,23,24,18,51,

%T 19,61,42,111,33,25,112,71,26,34,27,43,113,81,52,114,115,91,62,116,44,

%U 28,117,118,119,35,36,29,53,121,122,211,72,123,212,63,37,45

%N First digit of a(n) is the a(n)-th digit of S [a(n+1) is the smallest available integer not yet present in S].

%C An example of what logologists call a "self-acronymic" sequence.

%C Except for the initial term, the sequence consists only of zeroless numbers A052382, since no other term can start with a digit 0. - _M. F. Hasler_, Jan 19 2015

%H Hans Havermann, <a href="/A126968/b126968.txt">Table of n, a(n) for n = 0..10000</a>

%e The first integer of S starts with the first digit of S: 0,

%e the second integer of S starts with the second digit of S: 1,

%e the third integer of S starts with the third digit of S: 2,

%e the fourth integer of S starts with the fourth digit of S: 3,

%e the fifth integer of S starts with the fifth digit of S: 4,

%e the sixth integer of S starts with the sixth digit of S: 5,

%e the 7th integer of S starts with the 7th digit of S: 6,

%e ...

%e the 11th integer of S ("11") starts with the 11th dig. of S : 1,

%e the 12th integer of S ("12") starts with the 12th dig. of S : 1,

%e the 13th integer of S ("13") starts with the 13th dig. of S : 1,

%e the 14th integer of S ("21") starts with the 14th dig. of S : 2, ...

%Y Cf. A126969.

%K nonn,base

%O 0,3

%A _Eric Angelini_, Mar 22 2007

%E Corrected and edited by Eric Angelini, Dec 05 2011

%E Corrected and extended by _Hans Havermann_, Jan 19 2015

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Last modified April 23 15:20 EDT 2024. Contains 371916 sequences. (Running on oeis4.)