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A068661
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Let N = 123456789101112131415... the concatenation of natural numbers; partition this number into minimal strings of noncomposite numbers, i.e., a(1) = 1 and a(2) onwards are primes.
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0
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1, 2, 3, 4567, 89, 101, 11, 2, 13, 14151617, 181, 920212223242526272829303132333435363738394041424344454647484950515253, 5, 455565758596061626364656667686970717273747576777879808182838485868788899091929394959697989
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OFFSET
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1,2
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COMMENTS
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The terms a(12) and a(14) have been certified prime with Primo. - Rick L. Shepherd, Apr 27 2002
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LINKS
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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