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Search: id:A068661
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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
1
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| 1, 2, 3, 4567, 89, 101, 11213, 14151617, 181, 920212223242526272829303132333435363738394041424344454647484950515253, 5, 45556575859606162636465666768697071727374757677787980818283848586878889909192939\ 4959697989
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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The terms a(10) and a(12) have been certified prime with Primo. - Rick L. Shepherd (rshepherd2(AT)hotmail.com), Apr 27 2002
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CROSSREFS
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Sequence in context: A097301 A020345 A085943 this_sequence A068826 A085944 A137078
Adjacent sequences: A068658 A068659 A068660 this_sequence A068662 A068663 A068664
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 01 2002
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EXTENSIONS
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Corrected and extended by Rick L. Shepherd (rshepherd2(AT)hotmail.com), Apr 04 2002
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