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Search: id:A132430
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| A132430 |
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Indices of primes in A075059. Numbers n such that 1+LCM{1, 2, ..., n} is prime. |
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+0
1
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| 0, 1, 2, 3, 4, 5, 6, 7, 9, 10, 19, 25, 31, 47, 48, 89, 90, 91, 92, 93, 94, 95, 96, 127, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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No more values through 1 + A003418(250). Checked using Alpertron and b-list by T. D. Noe for A003418.
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FORMULA
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Integers n such that A075059(n) is prime. n such that 1 + A003418(n) = 1 + LCM{1, 2, ..., n} is prime.
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EXAMPLE
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8 is not in the sequence because A075059(8) = 1 + A003418(8) = 1 + LCM{1, 2, ..., 8} = 841 = 29^2 is not prime.
127 is in the sequence because A075059(127) = 1 + A003418(127) = 1 + LCM{1, 2, ..., 127} = 6676878045498705789701874602220118271269436344024536001 is prime.
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CROSSREFS
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Cf. A000040, A003418, A075059.
Sequence in context: A059879 A049537 A039171 this_sequence A039270 A039208 A039119
Adjacent sequences: A132427 A132428 A132429 this_sequence A132431 A132432 A132433
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KEYWORD
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easy,more,nonn
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AUTHOR
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Jonathan Vos Post (jvospost3(AT)gmail.com), Nov 13 2007
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