OFFSET
1,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 1..1000
EXAMPLE
Written as a triangle:
0;
1;
3;
5,8;
11,15;
18,22,26,31;
35,40,45,51;
55,60,65,71,77,83,90;
95,101,107,114,120,127,134,142;
147,153,159,166,173,180,188,195,203,211,219,228;
234,241,248,256,263,271,279,288,296,304,313,322,331,341;
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Omar E. Pol, Feb 21 2012
STATUS
approved