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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
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, 39, 42, 59, 51, 54, 56, 62, 68, 2000, 63, 67, 80, 69, 70, 72, 73, 82, 90, 600, 81, 83, 91, 601, 84, 92, 97, 103, 201, 104, 106, 107, 112, 113, 120, 126, 130, 202, 131
OFFSET
1,1
COMMENTS
Further work is needed to establish that the sequence is well-defined and that this is the correct beginning.
CROSSREFS
Sequence in context: A171087 A105364 A180405 * A209168 A209162 A127366
KEYWORD
nonn,base
AUTHOR
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
STATUS
approved