%I A025530
%S A025530 1,1,5,7,47,37,319,533,1879,1627,20417,18107,263111,237371,261395,477745,
%T A025530 8842385,8161705,167324635,155685007,166770367,156188887,3825136961,
%U A025530 3602044091,19081066231,18051406831,57128792093,54260455193,1653866633797
%N A025530 (1/1 - 1/2 + ... + d/n)*LCM{1,2,...,n}, where d = (-1)^(n-1).
%Y A025530 Cf. A058312, A058313.
%Y A025530 Sequence in context: A058313 A120301 A119787 this_sequence A106114 A110420 
               A123789
%Y A025530 Adjacent sequences: A025527 A025528 A025529 this_sequence A025531 A025532 
               A025533
%K A025530 nonn,easy,nice
%O A025530 1,3
%A A025530 Clark Kimberling (ck6(AT)evansville.edu)