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A066631
The sequence f(1), f(2), ... as defined in A068192.
2
4, 8, 24, 120, 840, 9240, 120120, 2042040, 38798760, 1202761560, 34880085240, 802241960520, 32891920381320, 1414352576396760, 52331045326680120, 4657463034074530680, 274790319010397310120, 14563886907551057436360
OFFSET
1,1
PROG
(PARI) {a=4; for(n=1, 18, print1(a, ", "); b=a-precprime(a-2); a=a*b)}
CROSSREFS
Cf. A068192.
Sequence in context: A045881 A303989 A052578 * A090896 A131637 A163143
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 10 2002
EXTENSIONS
Edited by Dean Hickerson and Klaus Brockhaus, Jun 10 2002
STATUS
approved