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 1-2 of 2 results.

A117137 Same as triangle in A117136, but omit final 1 from each row.

Original entry on oeis.org

1, 1, 2, 4, 1, 3, 6, 2, 7, 1, 4, 8, 3, 9, 2, 10, 1, 5, 10, 4, 11, 3, 12, 2, 13, 1, 6, 12, 5, 13, 4, 14, 3, 15, 2, 16, 1, 7, 14, 6, 15, 5, 16, 4, 17, 3, 18, 2, 19, 1
Offset: 0

Views

Author

N. J. A. Sloane, Apr 21 2006

Keywords

Comments

Row n has length 2n+1.

Examples

			Triangle begins:
Row 0: 1
Row 1: 1 2 4
Row 2: 1 3 6 2 7
Row 3: 1 4 8 3 9 2 10
Row 4: 1 5 10 4 11 3 12 2 13
...

Crossrefs

Cf. A117136, A046901, A008344.
The segments of A046901 appear as rows 2, 7, 22, 67, ... (A060816) of this array.

A117138 Similar to A117136 but begin each row with 0. Equals A117136 - 1.

Original entry on oeis.org

0, 0, 0, 1, 3, 0, 0, 2, 5, 1, 6, 0, 0, 3, 7, 2, 8, 1, 9, 0, 0, 4, 9, 3, 10, 2, 11, 1, 12, 0, 0, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15, 0, 0, 6, 13, 5, 14, 4, 15, 3, 16, 2, 17, 1, 18, 0
Offset: 0

Views

Author

N. J. A. Sloane, Apr 21 2006

Keywords

Showing 1-2 of 2 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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