A131308 Alternate A001477 and tripled 2*A000027.

0, 2, 2, 2, 1, 4, 4, 4, 2, 6, 6, 6, 3, 8, 8, 8, 4, 10, 10, 10, 5, 12, 12, 12, 6, 14, 14, 14, 7, 16, 16, 16, 8, 18, 18, 18, 9, 20, 20, 20, 10, 22, 22, 22, 11, 24, 24, 24, 12, 26, 26, 26, 13, 28, 28, 28, 14, 30, 30, 30, 15, 32, 32, 32, 16, 34, 34, 34, 17, 36, 36, 36, 18, 38, 38, 38, 19

Offset: 0

Author

Paul Curtz, Sep 29 2007

Keywords

• nonn