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A068857 a(1) = 0 = 0*2; a(n) = smallest multiple of a(n-1) which is of the form 2k*(2k+2). 2

%I

%S 0,8,24,48,288,16128,11950848,4636929024,41732361216,375591250944,

%T 3380321258496,30422891326464,273806021938176,2464254197443584,

%U 22178287776992256,199604589992930304,399209179985860608

%N a(1) = 0 = 0*2; a(n) = smallest multiple of a(n-1) which is of the form 2k*(2k+2).

%e 24 = 4*6 is a member and the smallest multiple of 24 which is of the form 2k(2k+2) is 48 = 6*8.

%K nonn

%O 0,2

%A _Amarnath Murthy_, Mar 12 2002

%E More terms from _Sascha Kurz_, Mar 23 2002

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Last modified August 24 18:52 EDT 2019. Contains 326295 sequences. (Running on oeis4.)