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A136603
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Positive numbers having a unique representation by inserting minus and plus-signs in 123456789.
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3
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176, 191, 194, 196, 209, 213, 215, 217, 223, 237, 253, 259, 263, 272, 274, 275, 289, 290, 292, 293, 295, 305, 307, 308, 353, 361, 367, 379, 380, 381, 382, 386, 392, 399, 401, 405, 415, 416, 418, 419, 427, 443, 461, 463, 467, 475, 477, 479, 481, 490, 491
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| A066957(a(n)) = 1; subsequence of A136601;
the sequence is finite with 869 terms.
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LINKS
| R. Zumkeller, Table of n, a(n) for n = 1..869
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EXAMPLE
| a(1) = 176 = 1 - 2 + 34 + 56 + 78 + 9;
a(2) = 191 = 123 + 4 + 56 + 7 - 8 + 9;
a(3) = 194 = 1 - 2 + 34 + 5 + 67 + 89;
a(4) = 196 = -1 + 2 + 34 + 5 + 67 + 89;
a(5) = 209 = 1 + 234 + 56 + 7 - 89;
a(6) = 213 = 123 + 4 + 5 - 6 + 78 + 9;
a(7) = 215 = 123 + 4 - 5 + 6 + 78 + 9;
a(8) = 217 = 123 - 4 + 5 + 6 + 78 + 9;
a(9) = 223 = -1 + 23 + 45 + 67 + 89;
a(10) = 237 = -123 + 456 - 7 - 89;
a(11) = 253 = -1 + 2 + 345 - 6 - 78 - 9;
a(12) = 259 = -1 + 234 - 56 - 7 + 89;
a(869) = 123456789 = A136602(1715).
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CROSSREFS
| Sequence in context: A056935 A104651 A172685 * A114824 A063344 A075291
Adjacent sequences: A136600 A136601 A136602 * A136604 A136605 A136606
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KEYWORD
| nonn,fini,base
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AUTHOR
| Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 12 2008
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