A066631 - OEIS

%I #7 Jun 24 2014 01:08:19

%S 4,8,24,120,840,9240,120120,2042040,38798760,1202761560,34880085240,

%T 802241960520,32891920381320,1414352576396760,52331045326680120,

%U 4657463034074530680,274790319010397310120,14563886907551057436360

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

%o (PARI) {a=4; for(n=1,18,print1(a,","); b=a-precprime(a-2); a=a*b)}

%Y Cf. A068192.

%K nonn

%O 1,1

%A _N. J. A. Sloane_, Jun 10 2002

%E Edited by _Dean Hickerson_ and _Klaus Brockhaus_, Jun 10 2002