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 A309706 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. 0
 2, 23, 235, 2357, 112357, 112357, 112357, 1123579, 1123579, 1123579, 1231579, 1231579, 12341579, 12431579, 12431579, 12453179, 12453179, 124536179, 124536179, 1124536719, 1234567139, 1234567139, 12345671839, 12345671839, 12456783197, 102456783197, 102456783197, 102456783197 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The version with subsequences of contiguous numbers is A054261. The sequence is nondecreasing, by definition. LINKS FORMULA a(n) <= A054261(n). - David A. Corneth, Aug 28 2019 EXAMPLE 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'. CROSSREFS Cf. A054261, A240959. Sequence in context: A098739 A287353 A091762 * A240959 A054261 A019518 Adjacent sequences:  A309703 A309704 A309705 * A309707 A309708 A309709 KEYWORD nonn,base AUTHOR Vincent Champain, Aug 28 2019 EXTENSIONS a(11)-a(28) from David A. Corneth, Aug 28 2019 STATUS approved

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Last modified December 9 03:42 EST 2021. Contains 349625 sequences. (Running on oeis4.)