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A119889
Prime soloist : prime number which is no member of any prime ensemble.
4
3, 13, 17, 19, 31, 37, 53, 59, 67, 71, 73, 79, 89, 97, 103, 107, 109, 127, 139, 149, 157, 163, 167, 179, 181, 193, 197, 199, 211, 229, 233, 239, 251, 257, 269, 271, 277, 283, 293, 307, 337, 347, 349, 359, 367, 373, 379, 383, 389, 397, 409, 419, 431, 433, 439
OFFSET
1,1
EXAMPLE
17 is in the sequence because the sum of the digits (8) is a composite number. 449 is in the sequence because the sum of the digits (17) is another prime soloist.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Luc Stevens (lms022(AT)yahoo.com), May 27 2006
EXTENSIONS
Corrected by T. D. Noe, Oct 25 2006
STATUS
approved