%I #35 Dec 08 2019 02:09:38
%S 2,23,235,2357,112357,112357,112357,1123579,1123579,1123579,1231579,
%T 1231579,12341579,12431579,12431579,12453179,12453179,124536179,
%U 124536179,1124536719,1234567139,1234567139,12345671839,12345671839,12456783197,102456783197,102456783197,102456783197
%N Smallest number that contains the first n primes as substrings in base 10. Substrings go from left to right, but numbers in the substrings can be separated by several numbers.
%C The version with subsequences of contiguous numbers is A054261.
%C The sequence is nondecreasing, by definition.
%F a(n) <= A054261(n). - _David A. Corneth_, Aug 28 2019
%e The series starts as A054261, but 112357 is followed by 112357 because 13 can be obtained with a subsequence '1','3' which is interrupted by '2'.
%Y Cf. A054261, A240959.
%K nonn,base
%O 1,1
%A _Vincent Champain_, Aug 28 2019
%E a(11)-a(28) from _David A. Corneth_, Aug 28 2019
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