Search: id:A119711
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%I A119711
%S A119711 229,241,373,1831,2053,2503,3109,5861,6053,6151,6871,8293,8821,9161,
%T A119711 9829,12049,13591,13781,14293,14887,16087,17737,19141,19333,20389,21493,
%U A119711 23333,23509,24151,25771,27109,28807,29269,31337,33413,33941,35509
%N A119711 Primes p such that p+1, p+2 and p+3 have equal number of divisors.
%e A119711 229 is OK since 230, 231 and 232 all have 8 divisors:
%e A119711 {1,2,5,10,23,46,115,230}, {1,3,7,11,21,33,77,231} and {1,2,4,8,29,58,
               116,232}.
%t A119711 Select[Prime@Range@5000,DivisorSigma[0,#+1]==DivisorSigma[0,#+2]==DivisorSigma[0,
               #+3]&]
%Y A119711 Cf. A008329, A049234.
%Y A119711 Sequence in context: A086002 A061783 A140017 this_sequence A062589 A094612 
               A112847
%Y A119711 Adjacent sequences: A119708 A119709 A119710 this_sequence A119712 A119713 
               A119714
%K A119711 nonn
%O A119711 1,1
%A A119711 Zak Seidov (zakseidov(AT)yahoo.com), Jul 29 2006

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