A263959 - OEIS

%I #35 Jul 02 2017 09:13:58

%S 1,2,4,355,499,1171,1543,5719

%N Number of decimal digits in A069151(n).

%C Subset of A227530 (Copeland-Erdős constant primes) corresponding to concatenation of a full (non-truncated) final prime.

%C a(9) > 459970. - _Eric W. Weisstein_ (according to Mark Rodenkirch as of Nov 21 2015)

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/ConsecutiveNumberSequences.html">Consecutive Number Sequences</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/IntegerSequencePrimes.html">Integer Sequence Primes</a>

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Smarandache-WellinPrime.html">Smarandache-Wellin Prime</a>

%t Cases[FromDigits /@ Rest[FoldList[Join, {}, IntegerDigits[Prime[Range[10^3]]]]], p_?PrimeQ :> IntegerLength[p]]

%o (PARI) p=""; for(n=1, 1e4, p=concat(p, prime(n)); if(ispseudoprime( eval(p)), print1(#Str(p)", "))) \\ _Altug Alkan_, Oct 30 2015

%Y Cf. A019518, A046035, A069151.

%Y Cf. A227529 (Copeland-Erdős constant primes).

%Y Cf. A227530 (decimal digits in n-th Copeland-Erdős constant prime).

%K nonn,base,more

%O 1,2

%A _Eric W. Weisstein_, Oct 30 2015