|
| |
|
|
A009993
|
|
List of numbers whose decimal digits are in strictly increasing order.
|
|
11
| |
|
|
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 13, 14, 15, 16, 17, 18, 19, 23, 24, 25, 26, 27, 28, 29, 34, 35, 36, 37, 38, 39, 45, 46, 47, 48, 49, 56, 57, 58, 59, 67, 68, 69, 78, 79, 89, 123, 124, 125, 126, 127, 128, 129, 134, 135, 136, 137, 138, 139, 145, 146, 147, 148, 149, 156, 157
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,3
|
|
|
COMMENTS
| Sequence has 512 terms, since every term except 0 corresponds to a nonempty subset of {1,2,3,4,5,6,7,8,9}.
A178788(a(n)) = 1. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 30 2010]
|
|
|
LINKS
| Zak Seidov, Table of n, a(n) for n = 1..512
Eric Weisstein's World of Mathematics, Digit
|
|
|
MATHEMATICA
| Flatten@Table[FromDigits/@Subsets[Range[1, 9], {n}], {n, 0, 9}] (*Zak Seidov*)
|
|
|
CROSSREFS
| Cf. A009995.
Sequence in context: A082757 A032881 A032848 * A190218 A055569 A072618
Adjacent sequences: A009990 A009991 A009992 * A009994 A009995 A009996
|
|
|
KEYWORD
| nonn,fini,base
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
|
| |
|
|
