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Search: id:A087715
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| A087715 |
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Table read by rows where i-th row consists of primes P of the form P=j*P(i)# -1 or P=j*P(i)# +1 with 0 < j < P(i+1). Here P(r)# = A002110. |
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4
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| 3, 3, 5, 5, 7, 11, 13, 17, 19, 23, 29, 31, 59, 61, 89, 149, 151, 179, 181, 211, 419, 421, 631, 839, 1049, 1051, 1259, 1471, 1889, 2099, 2309, 2311, 4621, 9239, 9241, 11549, 11551, 13859, 18481, 20789, 23099, 25409, 25411, 30029, 90089, 120121, 150151
(list; table; graph; listen)
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OFFSET
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0,1
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EXAMPLE
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Table begins:
3,3,5,
5,7,11,13,17,19,23,
29,31,59,61,89,149,151,179,181,
211,419,421,631,839,1049,1051,1259,1471,1889,2099,
2309,2311,4621,9239,9241,11549,11551,13859,18481,20789,23099,25409,25411
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PROGRAM
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(PARI) {for(i=1, 6, p=prod(j=1, i, prime(j)); for(j=1, prime(i+1)-1, c=j*p; if(isprime(c-1), print1(c-1 ", ")); if(isprime(c+1), print1(c+1 ", ")); ); ); }
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CROSSREFS
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Cf. A087714, A087716, A087728.
Sequence in context: A095878 A077381 A157966 this_sequence A092316 A142456 A098508
Adjacent sequences: A087712 A087713 A087714 this_sequence A087716 A087717 A087718
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KEYWORD
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tabl,nonn
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AUTHOR
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Pierre CAMI (colettecami(AT)aol.com), Sep 29 2003
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EXTENSIONS
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Edited by Ray Chandler (rayjchandler(AT)sbcglobal.net), Sep 30 2003
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