A179770 - OEIS

%I #5 Jul 19 2017 21:54:20

%S 0,0,1,1,1,1,1,1,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,1,1,0,1,1,1,0,

%T 1,1,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,1,1,0,1,0,1,0,1,1,1,0,1,0,1,0,1,0,

%U 1,0,1,0,1,0,1,0,1,0,1,1,1,0,1,1,1,0,1,0,1,0,1,0,1,0,1,1,1,0,1,0,1,0

%N The fourth central column of triangle A122242, i.e., A179761(4), A179761(11), A179761(20), A179761(31), ...

%H A. Karttunen, <a href="/A179770/b179770.txt">Table of n, a(n) for n = 1..1024</a>

%F a(n) = A179761(A028875(n+2)).

%Y Cf. A179771-A179774, and also A179775, A179830.

%K nonn

%O 1,1

%A _Antti Karttunen_, Aug 03 2010