OFFSET
1,5
EXAMPLE
Triangle begins:
1;
1, 1;
1, 2, 1;
1, 2, 2, 1;
1, 2, 2, 2, 1;
1, 2, 3, 3, 2, 1;
1, 2, 3, 3, 3, 2, 1;
1, 2, 3, 3, 3, 3, 2, 1;
1, 2, 3, 4, 4, 4, 3, 2, 1;
1, 2, 3, 4, 4, 4, 4, 3, 2, 1;
1, 2, 3, 4, 4, 4, 4, 4, 3, 2, 1;
1, 2, 3, 4, 5, 5, 5, 5, 4, 3, 2, 1;
1, 2, 3, 4, 5, 5, 5, 5, 5, 4, 3, 2, 1;
1, 2, 3, 4, 5, 5, 5, 5, 5, 5, 4, 3, 2, 1;
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Omar E. Pol, Nov 10 2009
STATUS
approved