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 1-6 of 6 results.

A169756 Similar to A169748, but now A = 1,3,5,7,9,11,..., B = 2,4,6,8,10,12, ...

Original entry on oeis.org

1, 4, 2, 7, 3, 10, 19, 8, 21, 6, 23, 17, 9, 28, 18, 39, 16, 41, 14, 43, 12, 45, 33, 68, 31, 70, 29, 15, 58, 13, 60, 11, 62, 46, 99, 44, 26, 83, 24, 85
Offset: 1

Views

Author

Rodolfo Kurchan, May 04 2010

Keywords

Extensions

More terms from Nathaniel Johnston, Nov 18 2010

A169752 A variation on Recamán's sequence A005132: see Comments for definition.

Original entry on oeis.org

1, 3, 2, 5, 4, 8, 6, 11, 17, 10, 7, 15, 24, 14, 9, 20, 12, 24, 37, 23, 38, 22, 39, 21, 40, 27, 47, 26, 48, 25, 49, 28, 53, 19, 45, 18, 46, 75, 105, 74, 42, 75, 41, 76, 112, 57, 94, 56, 95, 55, 96, 54, 97, 141, 52, 97, 51, 98, 50, 99, 149, 200, 148, 201, 147, 92, 36, 93, 35, 94
Offset: 1

Views

Author

Rodolfo Kurchan, Apr 08 2010

Keywords

Comments

Similar to A169748, but now B = 1,1,2,3,5,8,... (the Fibonacci numbers).

Extensions

Corrected and extended by D. S. McNeil, May 09 2010

A169749 A variation on Recamán's sequence A005132: see Comments for definition.

Original entry on oeis.org

1, 3, 6, 2, 7, 5, 11, 4, 12, 8, 17, 27, 16, 10, 22, 9, 23, 15, 30, 14, 31, 13, 32, 52, 42, 21, 43, 20, 44, 19, 45, 18, 46, 34, 63, 33, 64, 50, 82, 49, 83, 48, 84, 47, 85, 69, 51, 90, 70, 110, 88, 129, 87, 130, 86, 41, 87, 40, 88, 39, 89, 38, 90, 37, 91, 36, 92, 35, 93, 152, 128
Offset: 1

Views

Author

Rodolfo Kurchan, Apr 08 2010

Keywords

Comments

Similar to A169748, but now B = 2,4,6,8,10,12,... (the even numbers).

Extensions

Corrected and extended by D. S. McNeil, May 09 2010

A169755 A variation on Recamán's sequence A005132: see Comments for definition.

Original entry on oeis.org

1, 3, 2, 5, 9, 4, 10, 8, 15, 7, 16, 6, 17, 14, 26, 13, 27, 12, 28, 11, 29, 25, 20, 39, 19, 40, 18, 41, 35, 59, 34, 60, 33, 61, 32, 62, 31, 24, 56, 23, 57, 22, 58, 21, 29, 67, 106, 66, 107, 65, 108, 64, 55, 45, 90, 44, 91, 43, 92, 42, 93, 82, 30, 83, 71, 125, 70, 126, 69, 127, 68
Offset: 1

Views

Author

Rodolfo Kurchan, Apr 08 2010

Keywords

Comments

We start with two sequences A and B. Here sequences A and B are both taken to be 1,2,3,4,5,6,7,....
We start with the first term of sequence A (which is 1).
To extend the sequence, we first try to subtract the next term of A from the current term, but that is allowed only if the result is a positive number not already in the sequence.
If that fails, we next try to subtract the next term of B from the current term, but again that is allowed only if the result is a positive number not already in the sequence.
If that fails, we next try to add the next term of A to the current term, but again that is allowed only if the result is a positive number not already in the sequence.
Finally, if that fails, we add the next term of B to the current term (this may produce repeated terms, but that is allowed at this step).

Crossrefs

Cf. A005132, A169748-A169752.

Extensions

Corrected and extended by D. S. McNeil, May 09 2010

A169750 A variation on Recamán's sequence A005132: see Comments for definition.

Original entry on oeis.org

1, 3, 6, 2, 7, 5, 11, 4, 12, 9, 18, 8, 19, 14, 26, 13, 27, 20, 35, 24, 40, 23, 10, 28, 47, 30, 50, 29, 51, 32, 55, 31, 56, 33, 59, 86, 58, 87, 57, 88, 120, 91, 60, 93, 127, 92, 128, 165, 203, 164, 124, 83, 41, 84, 128, 173, 136, 90, 43, 91, 42, 92, 143, 102, 154, 101, 155
Offset: 1

Views

Author

Rodolfo Kurchan, Apr 08 2010

Keywords

Comments

Similar to A169748, but now B = 2,3,5,7,... (the primes).

Extensions

Corrected and extended by D. S. McNeil, May 09 2010

A169751 A variation on Recamán's sequence A005132: see Comments for definition.

Original entry on oeis.org

1, 3, 6, 2, 7, 4, 10, 17, 9, 18, 8, 19, 13, 25, 12, 26, 11, 27, 44, 35, 23, 5, 24, 44, 29, 50, 28, 51, 33, 57, 32, 58, 31, 59, 30, 60, 39, 15, 46, 14, 47, 20, 54, 89, 53, 16, 54, 93, 63, 103, 62, 104, 61, 105, 72, 36, 81, 42, 88, 41, 89, 40, 90, 48, 99, 151, 98, 152, 97, 52
Offset: 1

Views

Author

Rodolfo Kurchan, Apr 08 2010

Keywords

Comments

Similar to A169748, but now B = 3,6,9,12,15,... (multiples of 3).

Extensions

Corrected and extended by D. S. McNeil, May 09 2010
Showing 1-6 of 6 results.

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