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.

Showing 1-5 of 5 results.

A175060 Inverse permutation to A175059.

Original entry on oeis.org

1, 2, 3, 4, 8, 5, 6, 7, 13, 14, 15, 9, 17, 10, 11, 12, 22, 23, 24, 25, 45, 26, 27, 16, 29, 30, 31, 18, 33, 19, 20, 21, 38, 39, 40, 41, 73, 42, 43, 44, 78, 79, 80, 46, 82, 47, 48, 28, 50, 51, 52, 53, 94, 54, 55, 32, 57, 58, 59, 34, 61, 35, 36, 37, 66, 67, 68, 69, 122, 70, 71, 72
Offset: 1

Views

Author

Leroy Quet, Dec 08 2009

Keywords

Links

Crossrefs

Cf. A175055, A175056, A175057, A175058, A175059

Extensions

Extended by Ray Chandler, Dec 18 2009

A175055 a(n) = decimal equivalent of {A033015(n) written in binary, and each run of 0's reduced in length by one digit, and each run of 1's reduced in length by one digit}.

Original entry on oeis.org

1, 3, 2, 7, 4, 6, 15, 8, 5, 12, 14, 31, 16, 9, 11, 24, 13, 28, 30, 63, 32, 17, 19, 10, 23, 48, 25, 27, 56, 29, 60, 62, 127, 64, 33, 35, 18, 39, 20, 22, 47, 96, 49, 51, 26, 55, 112, 57, 59, 120, 61, 124, 126, 255, 128, 65, 67, 34, 71, 36, 38, 79, 40, 21, 44, 46, 95, 192, 97, 99
Offset: 1

Views

Author

Leroy Quet, Dec 08 2009

Keywords

Comments

This is a permutation of the positive integers. Sequence A175056 is its inverse permutation.

Links

Crossrefs

Cf. A033015, A175056, A175057, A175058, A175059, A175060

Programs

  • Mathematica
    FromDigits[Join @@ #, 2] & /@ Map[Drop[#, 1] &, Select[Array[Split@ IntegerDigits[#, 2] &, 905], Min[Length /@ #] > 1 &], {2}] (* Michael De Vlieger, Sep 03 2017 *)

Extensions

Extended by Ray Chandler, Dec 18 2009

A175057 a(n) = decimal equivalent of {A175054(n) written in binary, and each run of 0's reduced in length by one digit}.

Original entry on oeis.org

1, 3, 2, 7, 4, 5, 6, 15, 8, 9, 11, 12, 13, 14, 31, 16, 17, 19, 10, 23, 24, 25, 27, 28, 29, 30, 63, 32, 33, 35, 18, 39, 20, 21, 22, 47, 48, 49, 51, 26, 55, 56, 57, 59, 60, 61, 62, 127, 64, 65, 67, 34, 71, 36, 37, 38, 79, 40, 41, 43, 44, 45, 46, 95, 96, 97, 99, 50, 103, 52, 53, 54
Offset: 1

Views

Author

Leroy Quet, Dec 08 2009

Keywords

Comments

This is a permutation of the positive integers. Sequence A175058 is its inverse permutation.

Links

Crossrefs

Cf. A175054, A175058, A175055, A175056, A175059, A175060

Programs

  • Mathematica
    Map[FromDigits[#, 2] &@ Flatten@ # &, Select[Array[Split@ IntegerDigits[#, 2] &, 216], FreeQ[#, {0}] &] /. w_List /; First@ w == 0 :> Most@ w] (* Michael De Vlieger, Sep 03 2017 *)

Extensions

Extended by Ray Chandler, Dec 18 2009

A175056 Inverse permutation to A175055.

Original entry on oeis.org

1, 3, 2, 5, 9, 6, 4, 8, 14, 24, 15, 10, 17, 11, 7, 13, 22, 37, 23, 39, 64, 40, 25, 16, 27, 45, 28, 18, 30, 19, 12, 21, 35, 58, 36, 60, 98, 61, 38, 63, 103, 168, 104, 65, 106, 66, 41, 26, 43, 71, 44, 73, 119, 74, 46, 29, 48, 79, 49, 31, 51, 32, 20, 34, 56, 92, 57, 94, 153, 95, 59
Offset: 1

Views

Author

Leroy Quet, Dec 08 2009

Keywords

Crossrefs

Cf. A175055, A175057, A175058, A175059, A175060

Extensions

Extended by Ray Chandler, Dec 18 2009

A175058 Inverse permutation to A175057.

Original entry on oeis.org

1, 3, 2, 5, 6, 7, 4, 9, 10, 19, 11, 12, 13, 14, 8, 16, 17, 31, 18, 33, 34, 35, 20, 21, 22, 40, 23, 24, 25, 26, 15, 28, 29, 52, 30, 54, 55, 56, 32, 58, 59, 105, 60, 61, 62, 63, 36, 37, 38, 68, 39, 70, 71, 72, 41, 42, 43, 77, 44, 45, 46, 47, 27, 49, 50, 89, 51, 91, 92, 93, 53, 95
Offset: 1

Views

Author

Leroy Quet, Dec 08 2009

Keywords

Crossrefs

Cf. A175055, A175056, A175057, A175059, A175060

Extensions

Extended by Ray Chandler, Dec 18 2009
Showing 1-5 of 5 results.

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