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A375758
Lexicographically earliest sequence of distinct positive integers such that for any n > 0, the initial digit of n divides a(n).
2
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 24, 26, 28, 30, 32, 34, 36, 38, 21, 27, 33, 39, 42, 45, 48, 51, 54, 57, 40, 44, 52, 56, 60, 64, 68, 72, 76, 80, 25, 35, 50, 55, 65, 70, 75, 85, 90, 95, 66, 78, 84, 96, 102, 108, 114
OFFSET
1,2
COMMENTS
This sequence is a permutation of the positive integers with inverse A375759.
EXAMPLE
The first terms are:
n a(n) a(n)/A30(n) | n a(n) a(n)/A30(n)
-- ---- ----------- | -- ---- -----------
1 1 1 | 16 16 16
2 2 1 | 17 17 17
3 3 1 | 18 18 18
4 4 1 | 19 19 19
5 5 1 | 20 20 10
6 6 1 | 21 22 11
7 7 1 | 22 24 12
8 8 1 | 23 26 13
9 9 1 | 24 28 14
10 10 10 | 25 30 15
11 11 11 | 26 32 16
12 12 12 | 27 34 17
13 13 13 | 28 36 18
14 14 14 | 29 38 19
15 15 15 | 30 21 7
PROG
(PARI) \\ See Links section.
CROSSREFS
Cf. A000030, A308539, A375759 (inverse).
Sequence in context: A324720 A374847 A247756 * A032520 A034837 A096105
KEYWORD
nonn,base
AUTHOR
Rémy Sigrist, Aug 26 2024
STATUS
approved