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A059863
a(n) = Product_{i=3..n} (prime(i)-4).
1
1, 1, 1, 3, 21, 189, 2457, 36855, 700245, 17506125, 472665375, 15597957375, 577124422875, 22507852492125, 967837657161375, 47424045200907375, 2608322486049905625, 148674381704844620625, 9366486047405211099375, 627554565176149143658125, 43301264997154290912410625
OFFSET
1,4
REFERENCES
See A059862 for references.
Steven R. Finch, Mathematical Constants, Cambridge, 2003, pp. 84-94.
LINKS
C. K. Caldwell, Prime k-tuple Conjecture
Steven R. Finch, Hardy-Littlewood Constants [Broken link]
Steven R. Finch, Hardy-Littlewood Constants [From the Wayback machine]
PROG
(PARI) a(n) = prod(i=3, n, prime(i)-4); \\ Michel Marcus, Aug 25 2019
KEYWORD
nonn
AUTHOR
Labos Elemer, Feb 28 2001
EXTENSIONS
More terms from Michel Marcus, Aug 25 2019
STATUS
approved