OFFSET
1,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 1..1000
The first 15,000 digits of cos(1) as calculated by Simon Plouffe at WorldWideSchool.org.
MATHEMATICA
Select[FromDigits/@Partition[RealDigits[Cos[1], 10, 1000][[1]], 6, 1], IntegerLength[#] == 6 && PrimeQ[ #]&] (* Harvey P. Dale, Jan 19 2013 *)
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Andrew G. West (WestA(AT)wlu.edu), Mar 30 2005
STATUS
approved