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A120313 a(n) = Product of k primes in arithmetic progression with common difference 6, otherwise a(n) = prime(n). 0
2, 3, 623645, 124729, 11339, 19, 667, 29, 49321, 1591, 43, 146969, 3127, 59, 23569729, 386389, 71, 5767 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

EXAMPLE

a(2) = 3 beacuse 3+6 = 9 and is not prime;

a(3) = 623645 = 5*11*17*23*29 and the common difference between successive primes is 6.

CROSSREFS

Sequence in context: A101445 A128668 A038537 * A176649 A082871 A139627

Adjacent sequences:  A120310 A120311 A120312 * A120314 A120315 A120316

KEYWORD

nonn

AUTHOR

Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Jun 20 2006

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Last modified February 15 17:45 EST 2012. Contains 205833 sequences.