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A136603 Positive numbers having a unique representation by inserting minus and plus-signs in 123456789. 3
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; text; internal format)
OFFSET

1,1

COMMENTS

A066957(a(n)) = 1; subsequence of A136601;

the sequence is finite with 869 terms.

LINKS

R. Zumkeller, Table of n, a(n) for n = 1..869 (full sequence)

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).

CROSSREFS

Sequence in context: A172685 A266058 A261678 * A114824 A305062 A336026

Adjacent sequences:  A136600 A136601 A136602 * A136604 A136605 A136606

KEYWORD

nonn,fini,full,base

AUTHOR

Reinhard Zumkeller, Jan 12 2008

STATUS

approved

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Last modified August 5 07:21 EDT 2020. Contains 336209 sequences. (Running on oeis4.)