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, 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

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

Keywords

• nonn
• base

Comments

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