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37, 43, 73, 79, 109, 127, 139, 181, 229, 241, 271, 277, 313, 331, 349, 367, 397, 421, 433, 457, 487, 547, 571, 577, 607, 613, 673, 691, 727, 733, 751, 757, 769, 823, 829, 853, 907, 919, 991, 1009, 1063, 1087, 1093, 1117, 1123, 1171, 1231, 1249, 1279
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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EXAMPLE
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367 is in the sequence because (1) it is prime and (2) the sum of its digits (3 + 6 + 7 = 16) plus the sum of the digits of 367^2 (134689 -> 1 + 3 + 4 + 6 + 8 + 9 = 31) equals 16 + 31 = 47, which is prime.
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MATHEMATICA
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Select[Prime[Range[300]], PrimeQ[Total[IntegerDigits[#]]+Total[IntegerDigits[#^2]]]&]
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CROSSREFS
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KEYWORD
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nonn,easy,base
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AUTHOR
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STATUS
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approved
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