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A033662 Possible digital sums of Smith numbers (conjectural). 1
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified December 14 09:20 EST 2018. Contains 318091 sequences. (Running on oeis4.)