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 A076162 Primes p such that p + sum of squares of digits of p is also prime. 7
 11, 13, 17, 19, 31, 73, 97, 101, 103, 107, 109, 127, 251, 277, 347, 367, 431, 433, 457, 499, 613, 631, 677, 691, 701, 709, 727, 811, 877, 941, 947, 1009, 1063, 1069, 1087, 1171, 1229, 1283, 1289, 1399, 1423, 1429, 1531, 1553, 1597, 1607, 1621, 1667, 1669, 1733 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Vincenzo Librandi, Table of n, a(n) for n = 1..1000 EXAMPLE 13 is OK because 13+(1^2+3^2)=23 is a prime. MATHEMATICA Select[Prime[Range[2, 300]], PrimeQ[#+Total[IntegerDigits[#]^2]]&] (* Vincenzo Librandi, Apr 13 2013 *) CROSSREFS Sequence in context: A106101 A032590 A181576 * A156902 A050674 A164329 Adjacent sequences:  A076159 A076160 A076161 * A076163 A076164 A076165 KEYWORD nonn,base AUTHOR Zak Seidov, Nov 01 2002 EXTENSIONS More terms from Vincenzo Librandi, Apr 13 2013 STATUS approved

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Last modified August 10 03:38 EDT 2022. Contains 356029 sequences. (Running on oeis4.)