OFFSET
1,1
LINKS
Wikipedia, Higgs prime.
EXAMPLE
a(1) = 17 because 4 * 9 * 25 * 49 * 121 * 169 = 901800900 and 901800900 is congruent to 4 mod (17 - 1).
CROSSREFS
KEYWORD
nonn
AUTHOR
Alonso del Arte, Feb 19 2007
STATUS
approved