OFFSET
1,1
COMMENTS
LINKS
EXAMPLE
Triangle begins:
2,1,
4,1,2,3,
7,1,2,3,4,5,
10,1,2,3,4,5,6,7,
13,1,2,3,4,5,6,7,8,9,
16,1,2,3,4,5,6,7,8,9,10,11,
19,1,2,3,4,5,6,7,8,9,10,11,12,13,
22,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,
25,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,
MATHEMATICA
Join[{2, 1}, Flatten[Table[Flatten[{3n+1, Range[2n+1]}], {n, 10}]]] (* Harvey P. Dale, Nov 24 2011 *)
CROSSREFS
KEYWORD
easy,nonn,tabf
AUTHOR
Omar E. Pol, Feb 23 2010
STATUS
approved