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Search: id:A126556
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| A126556 |
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Arithmetic mean of two consecutive prime interprimes of second order: interprimes of third order. |
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+0
6
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| 734, 2825, 5957, 10305, 13932, 15830, 18825, 25084, 30205, 32121, 34901, 40640, 47984, 70842, 102897, 120165, 125973, 130250, 138924, 145480, 148894, 154236, 161676, 167730, 174737, 180632, 183077, 191253, 210375, 224327, 232817, 246285
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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a(n) = (A126555(n)+A126555(n+1))/2.
For primes in this sequence (prime interprimes of third order) see A126557.
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PROGRAM
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(PARI) {m=250000; a=0; g=0; p=2; q=3; r=5; while(r<=m, if((p+r)/2==q, if(a>0, b=(a+q)/2; if(isprime(b), if(g>0, print1(h=(g+b)/2, ", ")); g=b)); a=q); p=q; q=r; r=nextprime(r+1))} - Klaus Brockhaus, Jan 11 2007
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CROSSREFS
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Cf. A006562 (balanced primes), A024675 (interprimes), A126554 (interprimes of second order), A126555 (prime interprimes of second order).
Sequence in context: A118055 A025356 A025348 this_sequence A096595 A083359 A083360
Adjacent sequences: A126553 A126554 A126555 this_sequence A126557 A126558 A126559
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Dec 27 2006
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EXTENSIONS
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Edited by Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Jan 11 2007
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