OFFSET
1,2
COMMENTS
Note that the central diagonal of table A117488 is 1 2 5 20 ...
EXAMPLE
A117488 begins
1
1 2 3
1 2 5 8 14
1 2 5 10 18 30 49
1 2 5 10 20 34 59 94 149
so a(n) begins
1 6 30 115 374 ...
CROSSREFS
KEYWORD
nonn
AUTHOR
Alford Arnold, Mar 22 2006
EXTENSIONS
More terms from David Wasserman, Nov 03 2010
STATUS
approved