

A098211


Start with the first n, which means: "Prolong the sequence with n digits, all having their parity opposite to that of n". Then read and obey the second n, then the third n, etc. The digits produced by the rule are concatenated so to build the slowest increasing sequence.


0



1, 2, 3, 5, 6, 8, 20, 22, 24, 31, 33, 35, 37, 39, 51, 53, 55, 57, 59, 71, 73, 75, 77, 79, 91, 111, 113, 115, 117, 119, 131, 133, 135, 137, 139, 151, 153, 155, 157, 159, 171, 200, 202, 204, 206, 208, 220, 222, 224, 226, 228, 240, 242, 244, 246, 248, 260, 262, 264
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OFFSET

1,2


LINKS

Table of n, a(n) for n=1..59.


EXAMPLE

The first term, "1", means: "Add 1 even digit to the sequence"  thus we write "2". We must now read and obey this "2": "Add 2 odd digits to the sequence"  thus we write 3 and 5. We will then write 3 even digits, followed by 5 even digits (altogether 8 even digits which will be concatenated, if necessary, thus "6 to "24", etc.


CROSSREFS

Sequence in context: A194626 A275323 A128994 * A218013 A287876 A073673
Adjacent sequences: A098208 A098209 A098210 * A098212 A098213 A098214


KEYWORD

base,easy,nonn


AUTHOR

Eric Angelini, Oct 25 2004


STATUS

approved



