1,2

A000336 := proc(n) option remember; if n <=4 then n else A000336(n-1)*A000336(n-2)*A000336(n-3)*A000336(n-4); fi; end;

Sequence in context: A006709 A115884 A010345 this_sequence A080613 A055006 A139050

Adjacent sequences: A000333 A000334 A000335 this_sequence A000337 A000338 A000339

nonn

N. J. A. Sloane (njas(AT)research.att.com).