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Search: id:A101511
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| A101511 |
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The first 2 digits of the sequence form a prime number (23), the next 3 digits form a prime number (457), the next 4 also (8923), the next 5 also (24373), the next 7 also (8394151), the next 8 also (52535471), etc., with a(n) < a(n+1). |
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+0
1
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| 2, 3, 4, 5, 7, 8, 9, 23, 24, 37, 38, 39, 41, 51, 52, 53, 54, 71, 72, 73, 74, 75, 78, 91, 93, 97, 98, 111, 131, 132, 139, 149, 151, 154, 173, 174, 175, 178, 191, 193, 211, 213, 215, 217, 231, 232, 311, 312, 323
(list; graph; listen)
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OFFSET
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2,1
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COMMENT
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Primes involved are: 23, 457, 8923, 24373, 8394151, 52535471, 727374757, 89, 193, 97, 9811, 113, 1132139, 149, 15115417, 317, 417517819, 1193, 2, 11213, 2, 15217, 23, 12323, 113, 12323; the number of digits of each prime, here, spells exactly the A sequence above : 2 3 4 5 7 8 9 2 3 2 4 3 7 3 8 3 9 4 1 5 1 5 2 5 3 5... The first available primes were chosen and chuncked so to force [a(n+1) - a(n)] to be minimal.
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LINKS
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Robert Mrozek, Prime generator
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CROSSREFS
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Sequence in context: A111796 A039124 A056759 this_sequence A111747 A101545 A034154
Adjacent sequences: A101508 A101509 A101510 this_sequence A101512 A101513 A101514
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KEYWORD
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base,easy,nonn
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AUTHOR
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Eric Angelini (eric.angelini(AT)kntv.be), Jan 25 2005
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