

A297969


Pick any digit "d" in the sequence; the sum ["d" + (the next d digits)] is always even.


1



1, 3, 4, 2, 5, 7, 8, 6, 9, 11, 13, 30, 21, 15, 17, 19, 31, 33, 35, 37, 39, 51, 34, 23, 36, 25, 50, 20, 27, 38, 29, 70, 22, 24, 41, 52, 26, 43, 40, 56, 53, 45, 65, 28, 42, 55, 60, 44, 57, 46, 59, 48, 73, 62, 71, 75, 61, 58, 77, 47, 49, 64, 74, 78, 63, 67, 81, 72, 79, 90, 91, 92, 68, 95, 69, 93
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OFFSET

1,2


COMMENTS

The sequence starts with a(1) = 1 and was always extended with the smallest available integer not yet present in the sequence. This is the lexicographically first sequence with this property.


LINKS



EXAMPLE

1 + 3 (the next digit) = 4 (even);
3 + 4,2,5 (the next 3 digits) = 14 (even);
4 + 2,5,7,8 (the next 4 digits) = 26 (even);
2 + 5,7 (the next 2 digits) = 14 (even);
...
9 + 1,1,1,3,3,0,2,1,1 = 22 (even);
...
0 + (no digit) = 0 (even).


CROSSREFS



KEYWORD

base,nonn


AUTHOR



STATUS

approved



