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A209544
Primes not expressed in form n<+>2, where operation <+> defined in A206853.
4
3, 17, 41, 73, 89, 97, 113, 137, 193, 233, 241, 257, 281, 313, 337, 353, 401, 409, 433, 449, 457, 521, 569, 577, 593, 601, 617, 641, 673, 761, 769, 809, 857, 881, 929, 937, 953, 977, 1009, 1033, 1049, 1097, 1129, 1153, 1193, 1201, 1217, 1249, 1289, 1297, 1321
OFFSET
1,1
COMMENTS
Trivially every odd prime is expressed in form n<+>1 (cf. A208982).
Are these related to A141174, A045390 or A007519? - R. J. Mathar, Mar 13 2012
FORMULA
For n>=2, a(n) = A007519(n-1). - Vladimir Shevelev, Apr 18 2012
KEYWORD
nonn,base
AUTHOR
STATUS
approved