OFFSET
1,1
COMMENTS
EXAMPLE
Triangle begins:
.2;
.2, 3;
.3, 4, 5;
.4, 5, 6, 7;
.7, 8, 9,10,11;
.8, 9,10,11,12,13;
11,12,13,14,15,16,17;
12,13,14,15,16,17,18,19;
15,16,17,18,19,20,21,22,23;
20,21,22,23,24,25,26,27,28,29;
21,22,23,24,25,26,27,28,29,30,31;
CROSSREFS
KEYWORD
AUTHOR
Omar E. Pol, Jul 10 2009
STATUS
approved