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A171007 Sequence S constructed with the property that the next term is the smallest integer not yet present in S such that the sum of the a(n) first digits of S is a prime. 2

%I #7 Dec 09 2018 12:07:19

%S 2,1,4,6,3,7,8,60,9,11,14,17,61,16,22,25,30,26,28,34,49,37,200,36,38,

%T 39,42,59,51,54,56,62,68,2000,63,67,80,69,70,72,73,82,90,600,81,83,91,

%U 601,84,92,97,103,201,104,106,107,112,113,120,126,130,202,131

%N Sequence S constructed with the property that the next term is the smallest integer not yet present in S such that the sum of the a(n) first digits of S is a prime.

%C Further work is needed to establish that the sequence is well-defined and that this is the correct beginning.

%K nonn,base

%O 1,1

%A _N. J. A. Sloane_, Sep 03 2010, based on discussions in the Sequence Fans Mailing List, started by Eric Angelini, with contributions from _M. F. Hasler_ and _D. S. McNeil_

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Last modified April 23 02:23 EDT 2024. Contains 371906 sequences. (Running on oeis4.)