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.

A136791 Triangle read by rows: (2 * A011971) - A000012.

Original entry on oeis.org

1, 1, 3, 3, 5, 9, 9, 13, 19, 29, 29, 39, 53, 73, 103, 103, 133, 173, 227, 301, 405, 405, 509, 643, 817, 1045, 1347, 1753, 1753, 2159, 2669, 3313, 4131, 5177, 6525, 8279, 8279, 100033, 12193, 14863, 18177, 22309, 27487, 34013, 42293, 42293, 50573, 60607, 72801, 87665, 105843, 128153, 155641, 189655, 231949
Offset: 0

Views

Author

Gary W. Adamson, Jan 21 2008

Keywords

Comments

Right border = A060719: (1, 3, 9, 29, 103, ...).
Row sums = A136792.

Examples

			First few rows of the triangle:
    1;
    1,   3;
    3,   5,   9;
    9,  13,  19,  29;
   29,  39,  53,  73, 103;
  103, 133, 173, 227, 301, 405;
  ...
		

Crossrefs

Programs

Formula

(2 * A011971) - A000012, where A011971 = Aitken's triangle. Given Aitken's triangle, add 1 immediately after every addition operation. Rightmost term in (n-1)-th row becomes leftmost term in n-th row.