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A152091
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Primes which are the sum of cousin prime pairs + 1.
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5
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11, 19, 31, 43, 79, 139, 163, 199, 211, 223, 331, 463, 619, 631, 883, 919, 1231, 1291, 1483, 1543, 1723, 1759, 1879, 2179, 2851, 2971, 3163, 3331, 3391, 3571, 3739, 4003, 4483, 4591, 4759, 4783, 4951, 5323, 5419, 5503, 6043, 6079, 6163, 6379, 6691, 7351
(list; graph; refs; listen; history; internal format)
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OFFSET
| 2,1
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FORMULA
| Cousin primes are prime pairs that differ by 4. Prime(n): the n-th prime number.
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EXAMPLE
| prime(2)=3,3+4=7, 3+7+1= 11, the first term in the sequence.
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PROG
| (PARI) g4(n) = for(x=2, n, p=prime(x); if(isprime(p+4), y=p+p+4+1; if(isprime(y), print1(y", "))))
(PARI) isA152091(n) = if(n%2==0, 0, isprime(n) && isprime((n-5)/2) && isprime((n+3)/2)) [From Michael B. Porter (michael_b_porter(AT)yahoo.com), Mar 17 2010]
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CROSSREFS
| Sequence in context: A196669 A049719 A155555 * A122869 A106535 A178150
Adjacent sequences: A152088 A152089 A152090 * A152092 A152093 A152094
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KEYWORD
| nonn
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AUTHOR
| Cino Hilliard (hillcino368(AT)hotmail.com), Nov 24 2008
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