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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A046219 Denominators of elements of 1/2-Pascal triangle (by row).

Original entry on oeis.org

1, 1, 1, 1, 2, 1, 1, 2, 2, 1, 1, 2, 1, 2, 1, 1, 2, 2, 2, 2, 1, 1, 2, 1, 1, 1, 2, 1, 1, 2, 2, 1, 1, 2, 2, 1, 1, 2, 1, 2, 1, 2, 1, 2, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 2, 2, 1, 1, 1, 1, 1, 1, 2, 2, 1, 1, 2, 1, 2, 1, 1, 1, 1, 1
Offset: 1

Views

Author

Mohammad K. Azarian

Keywords

Examples

			1/1; --> 1
1/1  1/1;  --> 1 1
1/1  1/2  1/1;  --> 1 2 1
1/1  3/2  3/2  1/1;  --> ...
1/1  5/2  3/1  5/2  1/1;
1/1  7/2 11/2 11/2  7/2  1/1;
1/1  9/2  9/1 11/1  9/1  9/2  1/1;
1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1;
...

Crossrefs

Cf. A046213.

Extensions

More terms from Sean A. Irvine, Apr 07 2021

A046220 Distinct numbers in writing first numerator and then denominator of 1/2-Pascal triangle (by row).

Original entry on oeis.org

1, 2, 3, 5, 7, 11, 9, 27, 20, 13, 19, 67, 40, 15, 51, 105, 147, 17, 33, 78, 126, 83, 111, 204, 273, 21, 305, 315, 477, 546, 23, 123, 407, 935, 792, 1023, 25, 73, 265, 671, 2519, 1815, 2046, 171, 338, 936, 3861, 6149, 29, 99, 847, 1274, 5733, 5005, 13871, 7722
Offset: 1

Views

Author

Mohammad K. Azarian

Keywords

Examples

			1/1; 1/1 1/1; 1/1 1/2 1/1; 1/1 3/2 3/2 1/1; 1/1 5/2 3/1 5/2 1/1; 1/1 7/2 11/2 11/2 7/2 1/1; 1/1 9/2 9/1 11/1 9/1 9/2 1/1; 1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; ...

Crossrefs

Cf. A046213.

Extensions

More terms from James Sellers, Dec 13 1999

A046221 Odd numbers on numerators of 1/2-Pascal triangle (by row).

Original entry on oeis.org

1, 1, 1, 1, 1, 1, 1, 3, 3, 1, 1, 5, 3, 5, 1, 1, 7, 11, 11, 7, 1, 1, 9, 9, 11, 9, 9, 1, 1, 11, 27, 27, 11, 1, 1, 13, 19, 67, 67, 19, 13, 1, 1, 15, 51, 105, 147, 147, 105, 51, 15, 1, 1, 17, 33, 147, 33, 17, 1, 1, 19, 83, 111, 273, 273, 111, 83, 19, 1, 1, 21, 51
Offset: 1

Views

Author

Mohammad K. Azarian

Keywords

Examples

			1/1; --> 1
1/1  1/1;  --> 1 1
1/1  1/2  1/1; --> 1 1 1
1/1  3/2  3/2  1/1; --> 1 3 3 1
1/1  5/2  3/1  5/2  1/1; --> 1 5 3 5 1
1/1  7/2 11/2 11/2  7/2  1/1; --> 1 7 11 11 7 1
1/1  9/2  9/1 11/1  9/1  9/2  1/1; --> 1 9 9 11 9 9 1
1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; --> 1 11 27 27 11 1
...

Crossrefs

Cf. A046213.

Extensions

More terms from Sean A. Irvine, Apr 07 2021

A046225 First numerator and then denominator of elements to right of central elements of 1/2-Pascal triangle.

Original entry on oeis.org

1, 1, 1, 1, 3, 2, 1, 1, 5, 2, 1, 1, 11, 2, 7, 2, 1, 1, 9, 1, 9, 2, 1, 1, 20, 1, 27, 2, 11, 2, 1, 1, 67, 2, 19, 1, 13, 2, 1, 1, 147, 2, 105, 2, 51, 2, 15, 2, 1, 1, 126, 1, 78, 1, 33, 1, 17, 2, 1, 1, 273, 1, 204, 1, 111, 1, 83, 2, 19, 2, 1, 1, 477, 1, 315, 1
Offset: 1

Views

Author

Mohammad K. Azarian

Keywords

Examples

			1/1; -->
1/1 1/1; --> 1 1
1/1 1/2 1/1; --> 1 1
1/1 3/2 3/2 1/1; --> 3 2 1 1
1/1 5/2 3/1 5/2 1/1; --> ...
1/1 7/2 11/2 11/2 7/2 1/1;
1/1 9/2 9/1 11/1 9/1 9/2 1/1;
1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; ...

Crossrefs

Cf. A046213.

Extensions

More terms from Sean A. Irvine, Apr 07 2021

A046227 First numerator and then denominator of elements to right of central elements of 1/2-Pascal triangle (by row), excluding 1's.

Original entry on oeis.org

3, 2, 5, 2, 11, 2, 7, 2, 9, 9, 2, 20, 27, 2, 11, 2, 67, 2, 19, 13, 2, 147, 2, 105, 2, 51, 2, 15, 2, 126, 78, 33, 17, 2, 273, 204, 111, 83, 2, 19, 2, 477, 315, 305, 2, 51, 21, 2, 1023, 792, 935, 2, 407, 2, 123, 2, 23, 2, 1815, 2519, 2, 671, 265, 73, 25, 2, 3861
Offset: 1

Views

Author

Mohammad K. Azarian

Keywords

Examples

			1/1; -->
1/1  1/1; -->
1/1  1/2  1/1; -->
1/1  3/2  3/2  1/1; --> 3 2
1/1  5/2  3/1  5/2  1/1; --> 5 2
1/1  7/2 11/2 11/2  7/2  1/1; --> ...
1/1  9/2  9/1 11/1  9/1  9/2  1/1;
1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1;
...

Crossrefs

Cf. A046213.

Extensions

More terms from Sean A. Irvine, Apr 07 2021

A046228 First numerator and then denominator of elements to right of central elements of 1/2-Pascal triangle (by row), excluding 1's and 2's.

Original entry on oeis.org

3, 5, 11, 7, 9, 9, 20, 27, 11, 67, 19, 13, 147, 105, 51, 15, 126, 78, 33, 17, 273, 204, 111, 83, 19, 477, 315, 305, 51, 21, 1023, 792, 935, 407, 123, 23, 1815, 2519, 671, 265, 73, 25, 3861, 6149, 3861, 936, 338, 171, 27, 13871, 5005, 5733, 1274, 847, 99, 29, 29315
Offset: 1

Views

Author

Mohammad K. Azarian

Keywords

Examples

			1/1; 1/1 1/1; 1/1 1/2 1/1; 1/1 3/2 3/2 1/1; 1/1 5/2 3/1 5/2 1/1; 1/1 7/2 11/2 11/2 7/2 1/1; 1/1 9/2 9/1 11/1 9/1 9/2 1/1; 1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; ...

Crossrefs

Cf. A046213.

Extensions

More terms from James Sellers, Dec 13 1999

A046229 First numerator and then denominator of elements to right of central elements of 1/2-Pascal triangle (by row), excluding 2's.

Original entry on oeis.org

1, 1, 1, 1, 3, 1, 1, 5, 1, 1, 11, 7, 1, 1, 9, 1, 9, 1, 1, 20, 1, 27, 11, 1, 1, 67, 19, 1, 13, 1, 1, 147, 105, 51, 15, 1, 1, 126, 1, 78, 1, 33, 1, 17, 1, 1, 273, 1, 204, 1, 111, 1, 83, 19, 1, 1, 477, 1, 315, 1, 305, 51, 1, 21, 1, 1, 1023, 1, 792, 1, 935, 407, 123, 23, 1, 1, 1815, 1
Offset: 1

Views

Author

Mohammad K. Azarian

Keywords

Examples

			1/1; 1/1 1/1; 1/1 1/2 1/1; 1/1 3/2 3/2 1/1; 1/1 5/2 3/1 5/2 1/1; 1/1 7/2 11/2 11/2 7/2 1/1; 1/1 9/2 9/1 11/1 9/1 9/2 1/1; 1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; ...

Crossrefs

Cf. A046213.

Extensions

More terms from James Sellers, Dec 13 1999

A046230 First denominator and then numerator of elements to right of central elements of 1/2-Pascal triangle (by row), excluding 2's.

Original entry on oeis.org

1, 1, 1, 1, 3, 1, 1, 5, 1, 1, 11, 7, 1, 1, 1, 9, 9, 1, 1, 1, 20, 27, 11, 1, 1, 67, 1, 19, 13, 1, 1, 147, 105, 51, 15, 1, 1, 1, 126, 1, 78, 1, 33, 17, 1, 1, 1, 273, 1, 204, 1, 111, 83, 19, 1, 1, 1, 477, 1, 315, 305, 1, 51, 21, 1, 1, 1, 1023, 1, 792, 935, 407, 123, 23, 1, 1, 1, 1815
Offset: 1

Views

Author

Mohammad K. Azarian

Keywords

Examples

			1/1; 1/1 1/1; 1/1 1/2 1/1; 1/1 3/2 3/2 1/1; 1/1 5/2 3/1 5/2 1/1; 1/1 7/2 11/2 11/2 7/2 1/1; 1/1 9/2 9/1 11/1 9/1 9/2 1/1; 1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; ...

Crossrefs

Cf. A046213.

Extensions

More terms from James Sellers, Dec 13 1999

A046531 Numerators of elements to right of central elements of 1/2-Pascal triangle (by row).

Original entry on oeis.org

1, 1, 3, 1, 5, 1, 11, 7, 1, 9, 9, 1, 20, 27, 11, 1, 67, 19, 13, 1, 147, 105, 51, 15, 1, 126, 78, 33, 17, 1, 273, 204, 111, 83, 19, 1, 477, 315, 305, 51, 21, 1, 1023, 792, 935, 407, 123, 23, 1, 1815, 2519, 671, 265, 73, 25, 1, 3861, 6149, 3861, 936, 338, 171
Offset: 1

Views

Author

Mohammad K. Azarian

Keywords

Examples

			1/1;
1/1 1/1;                               -->  1
1/1 1/2 1/1;                           -->  1
1/1 3/2 3/2 1/1;                       -->  3  1
1/1 5/2 3/1 5/2 1/1;                   -->  5  1
1/1 7/2 11/2 11/2 7/2 1/1;             --> 11  7 1
1/1 9/2 9/1 11/1 9/1 9/2 1/1;          -->  9  9 1
1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1; --> 20 27 11 1

Links

Crossrefs

Cf. A046213, A046226.

Extensions

More terms from Sean A. Irvine, Apr 13 2021

A046532 First numerator and then denominator of 1/2-Pascal triangle (by row), excluding 2's.

Original entry on oeis.org

1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 1, 1, 1, 1, 5, 3, 1, 5, 1, 1, 1, 1, 7, 11, 11, 7, 1, 1, 1, 1, 9, 9, 1, 11, 1, 9, 1, 9, 1, 1, 1, 1, 11, 27, 20, 1, 20, 1, 27, 11, 1, 1, 1, 1, 13, 19, 1, 67, 40, 1, 67, 19, 1, 13, 1, 1, 1, 1, 15, 51
Offset: 1

Views

Author

Mohammad K. Azarian

Keywords

Examples

			1/1;
1/1 1/1;
1/1 1/2 1/1;
1/1 3/2 3/2 1/1;
1/1 5/2 3/1 5/2 1/1;
1/1 7/2 11/2 11/2 7/2 1/1;
1/1 9/2 9/1 11/1 9/1 9/2 1/1;
1/1 11/2 27/2 20/1 20/1 27/2 11/2 1/1;
without the 2's.

Crossrefs

Cf. A046213.
Previous Showing 11-20 of 21 results. Next

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