A378106 Lexicographically earliest sequence of distinct positive integers such that among two consecutive terms, the least term divides a positive number whose decimal expansion appears in that of the other term.
1, 2, 4, 8, 16, 3, 6, 12, 24, 48, 96, 9, 18, 36, 72, 7, 14, 28, 56, 5, 10, 20, 40, 80, 160, 15, 30, 60, 120, 240, 480, 32, 64, 128, 256, 25, 50, 100, 200, 400, 800, 1600, 75, 150, 300, 600, 1200, 2400, 4800, 192, 19, 38, 76, 152, 13, 26, 52, 104, 208, 416, 41
Offset: 1
Examples
The first terms are: n a(n) -- ---- 1 1 2 2 3 4 4 8 5 16 6 3 (3 divides 6, and 6 appears in 16) 7 6 8 12 9 24 10 48 11 96 12 9 13 18 14 36 15 72
Links
- Rémy Sigrist, Table of n, a(n) for n = 1..10000
- Rémy Sigrist, PARI program
Programs
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PARI
\\ See Links section.
Comments