OFFSET
0,2
COMMENTS
LINKS
Eric Weisstein's World of Mathematics, Smooth Number
FORMULA
G.f.: 1/((1 - 2*x)*(1 - 6*x*y)). - Stefano Spezia, Apr 28 2024
EXAMPLE
From Stefano Spezia, Apr 28 2024: (Start)
Triangle begins:
1;
2, 6;
4, 12, 36;
8, 24, 72, 216;
16, 48, 144, 432, 1296;
32, 96, 288, 864, 2592, 7776;
...
(End)
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Reinhard Zumkeller, Nov 20 2004
STATUS
approved