A142882 First trisection of A120070.

3, 15, 24, 9, 27, 48, 33, 63, 48, 15, 72, 45, 99, 84, 51, 120, 105, 72, 21, 135, 108, 63, 168, 153, 120, 69, 195, 180, 147, 96, 27, 216, 189, 144, 81, 255, 240, 207, 156, 87, 288, 273, 240, 189, 120, 33, 315, 288, 243, 180, 99, 360, 345, 312, 261, 192, 105, 399, 384, 351, 300, 231, 144, 39

Offset: 1

Author

Paul Curtz, Sep 28 2008

Keywords

• nonn
• tabf

Comments

All entries are multiples of 3.

Examples

			If we keep the association with lines in A120070, this triangle here that keeps only each third element starts:
3;
./.;
15;
24,9;
27;
48,33;
63,48,15;
72,45;
99,84,51;
120,105,72,21;
135,108,63;
168,153,120,69;
195,180,147,96,27;
216,189,144,81;
255,240,207,156,87;
288,273,240,189,120,33;
315,288,243,180,99;
360,345,312,261,192,105;
399,384,351,300,231,144,39;