cp's OEIS Frontend

A131436 Triangle read by rows, (n-1) zeros followed by 2^n - 1.

%I A131436 #6 May 23 2012 16:33:02
%S A131436 1,0,3,0,0,7,0,0,0,15,0,0,0,0,31,0,0,0,0,0,63,0,0,0,0,0,0,127,0,0,0,0,
%T A131436 0,0,0,255,0,0,0,0,0,0,0,0,511,0,0,0,0,0,0,0,0,0,1023,0,0,0,0,0,0,0,0,
%U A131436 0,0,2047,0,0,0,0,0,0,0,0,0,0,0,4095,0,0
%N A131436 Triangle read by rows, (n-1) zeros followed by 2^n - 1.
%H A131436 Harvey P. Dale, <a href="/A131436/b131436.txt">Table of n, a(n) for n = 1..1000</a>
%F A131436 2*A059268(n)-A059268(n+1). - _Paul Curtz_, Jul 03 2008
%e A131436 First few rows of the triangle are:
%e A131436 1;
%e A131436 0, 3;
%e A131436 0, 0, 7;
%e A131436 0, 0, 0, 15;
%e A131436 0, 0, 0, 0, 31;
%e A131436 ...
%t A131436 Flatten[Table[{PadRight[{},n-1,0],2^n-1},{n,20}]] (* _Harvey P. Dale_, May 23 2012 *)
%Y A131436 Cf. A131437, A131438, A131439.
%K A131436 nonn,tabl
%O A131436 1,3
%A A131436 _Gary W. Adamson_, Jul 11 2007
%E A131436 More terms from _Harvey P. Dale_, May 23 2012