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A132084 A051717(2n). 1

%I #9 Sep 17 2015 02:53:26

%S 1,3,30,42,30,66,2730,6,510,798,330,138,2730,6,870,14322,510,6,

%T 1919190,6,13530,1806,690,282,46410,66,1590,798,870,354,56786730,6,

%U 510,64722,30,4686,140100870,6,30,3318,230010,498,3404310,6,61410,272118,1410,6,4501770

%N A051717(2n).

%C Essentially the same as A006954.

%C a(2n) + a(2n+1) = 4, 72, 96, 2736, 1308, 468, ... are multiples of 4.

%p C:=proc(n) if n=0 then RETURN(1); fi; if n mod 2 = 0 then RETURN(bernoulli(n)+bernoulli(n-1)); else RETURN(-bernoulli(n)-bernoulli(n-1)); fi; end;

%p A051717 := proc(n) denom(C(n)) ; end: A132084 := proc(n) A051717(2*n) ; end: seq(A132084(n),n=0..120) ; # _R. J. Mathar_, Sep 07 2009

%K nonn,frac

%O 0,2

%A _Paul Curtz_, Aug 26 2008

%E Extended by _R. J. Mathar_, Sep 07 2009

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Last modified March 29 05:48 EDT 2024. Contains 371265 sequences. (Running on oeis4.)