A033662 Possible digital sums of Smith numbers (conjectural).

4, 9, 13, 15, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82

Offset

1,1

Comments

Numbers not in sequence are not digital sums of Smith numbers. Numbers in sequence are almost certainly so.

Links

Table of n, a(n) for n=1..70.

Formula

a(n) in {4, 9, 13, 15} or a(n) >= 17

Crossrefs

Cf. A006753.

Sequence in context: A312871 A247881 A010412 * A312872 A312873 A312874

Adjacent sequences: A033659 A033660 A033661 * A033663 A033664 A033665

Keyword

base,nonn

Author

David W. Wilson

Status

approved