OFFSET
1,1
EXAMPLE
2*3*5 + 7*7 = 79 prime as 2*3*5*7 - 11*11 = 89 prime so a(1)=3.
2*3*5*7 + 11*11 = 331 prime as 2*3*5*7*11 -13*13 = 2141 prime so a(2)=4.
2*3*5*7*11 + 13*13 = 2479 = 37*67 composite.
2*3*5*7*11*13 - 17*17 = 29471 prime so a(3)=5.
CROSSREFS
KEYWORD
more,nonn
AUTHOR
Pierre CAMI, May 08 2005
EXTENSIONS
a(20)-a(30) from Donovan Johnson, Apr 27 2008
a(31)-a(33) from Michael S. Branicky, Jun 09 2023
STATUS
approved