cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A181094 Permutation of positive integers created from sequence A000040(n) = primes.

Original entry on oeis.org

2, 1, 3, 5, 4, 7, 6, 11, 13, 17, 8, 19, 9, 23, 29, 31, 10, 37, 12, 41, 43, 47, 14, 53, 59, 61, 67, 71, 15, 73, 16, 79, 83, 89, 97, 101, 18, 103, 107, 109, 20, 113, 21, 127, 131, 137, 22, 139, 149, 151, 157, 163, 24, 167, 173, 179, 181, 191, 25, 193, 26, 197, 199, 211, 223
Offset: 1

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Author

Jaroslav Krizek, Oct 02 2010

Keywords

Comments

Method of creation of sequence a(n) from b(n) = A000040(n):
Take b(1) and put in vacancy place a(1), swap this place and b(1), repeat with b(2), b(3), ...:
b(1) = 2, a(1) = 2, a(2) = 1,
b(2) = 3, a(3) = 3,
b(3) = 5, a(4) = 5, a(5) = 4,
b(4) = 7, a(6) = 7, a(7) = 6,
b(5) = 11, a(8) = 11, a(11) = 8,
...

Formula

a(n) = A163465(n+1) for n >= 4. a(n) = A181095(n) for n >= 3.

Extensions

Corrected by Jaroslav Krizek Jaroslav Krizek, Oct 24 2010
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