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A134930 Nearest-neighbors of twin primes. +0
4
2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 28, 30, 32, 40, 42, 44, 58, 60, 62, 70, 72, 74, 100, 102, 104, 106, 108, 110, 136, 138, 140, 148, 150, 152, 178, 180, 182, 190, 192, 194, 196, 198, 200, 226, 228, 230, 238, 240, 242, 268, 270, 272, 280, 282, 284 (list; graph; listen)
OFFSET

1,1

COMMENT

This sequence consists of the number 2 followed by the triplet composites: A134928.

LINKS

O. E. Pol, Determinacion geometrica de los numeros primos y compuesto.

FORMULA

a(1)=2. For n>2, a(n)=A134928(n-1)

EXAMPLE

2, 4 and 6 are nearest-neighbors of twin primes because 3 and 5 are twin primes.

CROSSREFS

Sequence in context: A064720 A029741 A085125 this_sequence A084562 A118070 A152966

Adjacent sequences: A134927 A134928 A134929 this_sequence A134931 A134932 A134933

KEYWORD

easy,nonn

AUTHOR

Omar E. Pol (info(AT)polprimos.com), Nov 16 2007

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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