%I

%S 1,1,1,3,1,3,3,13,1,3,3,13,3,13,13,75,1,3,3,13,3,13,13,75,3,13,13,75,

%T 13,75,75,541

%N First column in matrix inverse of (A047999*A154990).

%e First column in the table:

%e 1,

%e 1,1,

%e 1,0,1,

%e 3,1,1,1,

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

%e 3,1,0,0,1,1,

%e 3,0,1,0,1,0,1,

%e 13,3,3,1,3,1,1,1,

%Y Cf. It appears that A000670 = A163270(A000079).

%K nonn

%O 1,4

%A _Mats Granvik_, Jul 24 2009