A129573 - OEIS

%I #6 Aug 10 2018 16:21:35

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

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

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

%N A097806 * A129372.

%H Andrew Howroyd, <a href="/A129573/b129573.txt">Table of n, a(n) for n = 1..1275</a> (rows 1..50)

%F A097806 * A129372 as infinite lower triangular matrices.

%e First few rows of the triangle are:

%e   1;

%e   1, 1;

%e   1, 1, 1;

%e   1, 0, 1, 1;

%e   1, 0, 0, 1, 1;

%e   1, 1, 0, 0, 1, 1;

%e   1, 1, 0, 0, 0, 1, 1;

%e   1, 0, 0, 0, 0, 0, 1, 1;

%e   ...

%o (PARI) T(n,k)=(n%k==0 && n/k%2) || ((n-1)%k==0 && (n-1)/k%2) \\ _Andrew Howroyd_, Aug 10 2018

%Y Row sums are A129574.

%Y Cf. A129572, A129372, A097806.

%K nonn,tabl

%O 1,1

%A _Gary W. Adamson_, Apr 22 2007

%E Duplicate a(35) removed and terms a(56) and beyond from _Andrew Howroyd_, Aug 10 2018