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

1,1

Comments

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

Links

Table of n, a(n) for n=1..63.

Crossrefs

Sequence in context: A171087 A105364 A180405 * A209168 A209162 A127366

Adjacent sequences: A171004 A171005 A171006 * A171008 A171009 A171010

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