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Search: id:A068826
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| A068826 |
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a(1) = 2; then the sequence of smallest primes (no zero digits to avoid ambiguity) not included earlier the concatenation of which is the cyclic pattern 23456789123456789123... |
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1
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| 2, 3, 4567, 89, 1234567891, 23, 4567891, 23456789, 1234567891234567891234567891, 23456789123456789, 1234567891234567891234567891234567891234567891234567891234567891234567, 89123, 4567891234567
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OFFSET
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1,1
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COMMENT
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a(14)=89123456789123...789123 (527 digits), a(15)= 4567891234567891234567891, a(16)=23456789123456789123, a(17)=4...1 (61 digits) and a(18)=2...3 (38 digits). a(9) through a(11) and a(13) through a(18) have been certified prime with Primo. a(19)=4... has at least 2700 digits. - Rick L. Shepherd
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CROSSREFS
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Sequence in context: A020345 A085943 A068661 this_sequence A085944 A137078 A115640
Adjacent sequences: A068823 A068824 A068825 this_sequence A068827 A068828 A068829
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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 08 2002
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EXTENSIONS
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More terms from Rick L. Shepherd (rshepherd2(AT)hotmail.com), May 25 2002
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