A156563 - OEIS

%I #8 Aug 03 2021 04:47:51

%S 2,2,6,5,8,8,10,12,14,14,17,18,20,20,24,24,27,26,30,28,34,31,36,34,40,

%T 38,42,41,44,45,47,47,50,49,54,53,57,55,60,59,62,62,64,66,67,68,70,70,

%U 74,74,76,77,80,80,82,83,84,87,88,90,90,94,94,96,97,100,101

%N a(n) = (-1)^n*Sum_{k=1..n} A078649(k)*(-1)^k.

%H Jinyuan Wang, <a href="/A156563/b156563.txt">Table of n, a(n) for n = 1..1000</a>

%Y Cf. A078649, A156562.

%K nonn

%O 1,1

%A _Benoit Cloitre_, Feb 10 2009