A048526 - OEIS

%I #10 Nov 12 2018 12:42:39

%S 37783,85601,259631,268721,350941,371939,378901,516521,665111,733331,

%T 883331,967781,1047929,1056521,1081721,1258811,1427411,1480573,

%U 1515929,1584901,1614929,1842131,1875311,1885981,2027801,2044873,2450531

%N Primes for which only four iterations of 'Prime plus its digit sum equals a prime' are possible.

%H Lars Blomberg, <a href="/A048526/b048526.txt">Table of n, a(n) for n = 1..10000</a>

%e prime 37783 -> 37783 + (3+7+7+8+3) = prime 37811 -> 37811 + (3+7+8+1+1) = prime 37831 -> 37831 + (3+7+8+3+1) = prime 37853 -> 37853 + (3+7+8+5+3) = prime 37879 -> next iteration yields composite 37913.

%Y Cf. A047791, A048519.

%K nonn,base

%O 1,1

%A _Patrick De Geest_, May 15 1999

%E Changed offset by _Lars Blomberg_, Dec 05 2013