A321128 Single-digit numbers in the order in which they first appear in the decimal expansions of prime numbers, followed by the two-digit numbers in the order in which they appear, then the three-digit numbers, and so on.
2, 3, 5, 7, 1, 9, 4, 6, 8, 0, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 10, 12, 27, 39, 14, 49, 15, 51, 57, 16, 63, 18, 81, 91, 93, 99, 21, 22, 33, 24, 25, 26, 69, 77, 28, 30, 34, 35, 36, 38, 40, 42, 44, 45, 46, 48, 87
Offset: 1
Examples
The first terms, alongside the corresponding prime numbers, are: n a(n) Prime -- ---- ----- 1 2 2 2 3 3 3 5 5 4 7 7 5 1 11 6 9 19 7 4 41 8 6 61 9 8 83 10 0 101 11 11 11 12 13 13 ... 30 89 89 31 97 97 32 10 101 33 12 127 34 27 127 35 39 139 36 14 149 37 49 149
Links
- Rémy Sigrist, Table of n, a(n) for n = 1..10000
- Rémy Sigrist, Colored scatterplot of the first 100000 terms
- Rémy Sigrist, Scatterplot of the first 100000 terms of the analog for the Euler totient function (A000010)
- Rémy Sigrist, PARI program for A321128
Programs
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PARI
See Links section.
Comments