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A210416
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List the positions of all digits 2 in the concatenation of all terms, not necessarily in order. This is the lexicographically earliest such sequence.
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10
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2, 20, 1, 6, 21, 9, 22, 10, 15, 23, 19, 222, 220, 25, 27, 29, 32, 35, 200, 40, 201, 45, 202, 47, 52, 203, 51, 59, 204, 64, 205, 69, 206, 74, 207, 79, 208, 84, 209, 89, 210, 94, 211, 99, 212, 101, 108, 213, 114, 214, 120, 215, 118, 127, 132, 216, 131, 141, 217
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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COMMENTS
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See A210415 for comments, links, and code.
See A098670 for a variant with increasing terms. - M. F. Hasler, Oct 08 2013
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LINKS
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Danny Rorabaugh, Table of n, a(n) for n = 1..1000
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EXAMPLE
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The sequence starts with 2: the second digit is equal to 2. In the second position we cannot write only 2 because the first number is already 2. So we use the minimum number greater than 2 and beginning with digit 2, i.e., 20. In the third position we can write 1 because the digit in the first position is 2. And so on.
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CROSSREFS
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Cf. A098670, A210414-A210423.
Sequence in context: A355466 A073444 A301637 * A351312 A220943 A082259
Adjacent sequences: A210413 A210414 A210415 * A210417 A210418 A210419
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KEYWORD
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nonn,base
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AUTHOR
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Paolo P. Lava, Mar 26 2012
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STATUS
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approved
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