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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A276446 Permutation of natural numbers: a(1) = 1; a(A000069(1+n)) = A088359(a(n)), a(A001969(1+n)) = A087686(1+a(n)), where A088359 & A087686 = numbers that occur only once & more than once in A004001, and A000069 & A001969 are odious & evil numbers.

Original entry on oeis.org

1, 3, 2, 6, 7, 4, 5, 11, 14, 15, 13, 8, 9, 10, 12, 20, 26, 30, 25, 31, 28, 23, 29, 16, 17, 18, 21, 19, 24, 27, 22, 37, 47, 57, 46, 62, 55, 44, 56, 63, 59, 50, 60, 41, 53, 61, 52, 32, 33, 34, 38, 35, 42, 48, 39, 36, 45, 54, 43, 58, 49, 40, 51, 70, 85, 105, 84, 120, 103, 82, 104, 126, 117, 98, 118, 79, 101, 119, 100, 127, 122, 108, 123, 89
Offset: 1

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Author

Antti Karttunen, Sep 03 2016

Keywords

Crossrefs

Inverse: A276445.
Similar or related permutations: A006068, A267112, A276444.

Programs

Formula

a(1) = 1, and for n > 1, if A010060(n) = 1 [when n is one of the odious numbers, A000069], a(n) = A088359(a(A115384(n)-1)), otherwise a(n) = A087686(1+a(A245710(n))).
As a composition of other permutations:
a(n) = A267112(A006068(n)).

A269852 Permutation of natural numbers: a(1) = 0, after which, a(2n) = A087686(1+a(n)), a(2n+1) = A088359(a(A268674(2n+1))).

Original entry on oeis.org

0, 1, 3, 2, 6, 7, 11, 4, 5, 14, 20, 15, 37, 26, 13, 8, 70, 12, 135, 30, 9, 47, 264, 31, 10, 85, 25, 57, 521, 29, 1034, 16, 28, 156, 23, 27, 2059, 292, 46, 62, 4108, 21, 8205, 105, 17, 557, 16398, 63, 19, 24, 22, 191, 32783, 56, 18, 120, 55, 1079, 65552, 61, 131089, 2114, 84, 32, 44, 60, 262162, 348, 59, 53
Offset: 1

Views

Author

Antti Karttunen, Mar 07 2016

Keywords

Comments

Note the indexing: Domain starts from 1, range from 0.

Crossrefs

Inverse: A269851.
Related or similar permutations: A252756, A267112, A269856.

Formula

a(1) = 0; after which, for even n, a(n) = A087686(1+a(n/2)), and for odd n, a(n) = A088359(a(A268674(n))).
Other identities. For all n >= 1:
a(2^n) = 2^(n-1).
As a composition of other permutations:
a(n) = A267112(A252756(n)).
Previous Showing 11-12 of 12 results.