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A158195
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Prime numbers such that sum of digits is even semiprime.
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0
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13, 19, 31, 37, 59, 73, 103, 109, 127, 149, 163, 167, 181, 211, 239, 257, 271, 293, 307, 347, 383, 419, 433, 491, 499, 509, 523, 541, 563, 613, 617, 631, 653, 743, 761, 769, 787, 811, 859, 877, 941, 967, 1009, 1021, 1049, 1063, 1117, 1153, 1171, 1193, 1201
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Even semiprime = 2*prime.
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EXAMPLE
| 13(1+3=2*2), 19(1+9=2*5), 31(3+1=2*2), 37(3+7=2*5), 59(5+9=2*7)
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CROSSREFS
| Cf. A000040, A100484.
Sequence in context: A164318 A092738 A115093 * A040092 A079130 A085413
Adjacent sequences: A158192 A158193 A158194 * A158196 A158197 A158198
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KEYWORD
| nonn,base,easy,less
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AUTHOR
| Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Mar 13 2009
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EXTENSIONS
| 257 added by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 15 2009
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