A118911 - OEIS

%I #12 Jul 04 2023 21:22:57

%S 1,1,3,3,3,3,5,5,3,3,9,9,5,5,11,11,3,3,9,9,9,9,15,15,5,5,15,15,11,11,

%T 21,21,3,3,9,9,9,9,15,15,9,9,27,27,15,15,33,33,5,5,15,15,15,15,25,25,

%U 11,11,33,33,21,21,43,43,3,3,9,9,9,9,15,15,9,9,27,27,15,15,33,33,9,9

%N Row sums of triangle in A128973.

%C Integers in A071053 repeated.

%F a(2*n) = a(2*n+1).

%F a(n) = Sum_{k=0..n} A128973(n,k).

%F a(2^k+m) = 3*a(m) for 0 <= m <= 2^(k-1) - 1, k >= 1.

%F a(4*n) = a(2*n) = A071053(n).

%Y Cf. A071053, A128973.

%K nonn

%O 0,3

%A _Philippe Deléham_, May 02 2007, Jan 06 2008

%E a(48) and following terms corrected by _Georg Fischer_, Jul 04 2023