A066631 The sequence f(1), f(2), ... as defined in A068192.

4, 8, 24, 120, 840, 9240, 120120, 2042040, 38798760, 1202761560, 34880085240, 802241960520, 32891920381320, 1414352576396760, 52331045326680120, 4657463034074530680, 274790319010397310120, 14563886907551057436360

Offset

1,1

Links

Table of n, a(n) for n=1..18.

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

Adjacent sequences: A066628 A066629 A066630 * A066632 A066633 A066634

Keyword

nonn

Author

N. J. A. Sloane, Jun 10 2002

Extensions

Edited by Dean Hickerson and Klaus Brockhaus, Jun 10 2002

Status

approved