OFFSET
0,1
FORMULA
a(n) = 1+prod_{i=1..n} A094357(i). - David Wasserman, May 03 2007
EXAMPLE
3, 8 and 15 are 1 less than a square and so are numbers 3, 3*8, 3*8*15.
CROSSREFS
KEYWORD
hard,nonn
AUTHOR
Amarnath Murthy, May 22 2004
EXTENSIONS
More terms from David Wasserman, May 03 2007
STATUS
approved