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%I #19 Jan 28 2022 04:08:10
%S 2,3,5,7,11,13,17,19,29,31,41,43,47,59,61,67,71,79,83,89,97,101,103,
%T 107,109,127,131,139,149,151,157,163,167,179,181,191,199,223,227,233,
%U 239,251,263,269,277,281,307,337,349,353,373,401,409,419,421,431,439,443,449,457,461
%N Prime numbers that cannot be formed by the concatenation of previous terms.
%C Previous terms can appear in any order but can be used at most once. - _Paolo P. Lava_, Mar 04 2010
%H David A. Corneth, <a href="/A141409/b141409.txt">Table of n, a(n) for n = 1..10000</a>
%H David A. Corneth, <a href="/A141409/a141409.gp.txt">PARI program</a>
%e 137 is not in the sequence because 13 || 7 -> 137;
%e 797 is not in the sequence because 7 || 97 or 79 || 7 -> 797.
%e 257 is not in the sequence because 2 || 5 || 7 = 257 where || denotes concatenation. - _David A. Corneth_, Jan 23 2022
%o (PARI) See Corneth link \\ _David A. Corneth_, Jan 23 2022
%Y Cf. A141033.
%K nonn,easy,base
%O 1,1
%A _Paolo P. Lava_ and _Giorgio Balzarotti_, Aug 04 2008, Aug 28 2008, Mar 04 2010
%E Offset changed to 1 and data corrected by _David A. Corneth_, Jan 23 2022
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