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A142882
First trisection of A120070.
0
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
1,1
COMMENTS
All entries are multiples of 3.
EXAMPLE
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;
CROSSREFS
Sequence in context: A344073 A366956 A009210 * A161467 A101133 A061386
KEYWORD
nonn,tabf
AUTHOR
Paul Curtz, Sep 28 2008
STATUS
approved