cp's OEIS Frontend

A143309 Triangle read by rows, A054525 * A143308, 1<=k<=n.

%I A143309 #9 Jul 13 2023 08:17:53
%S A143309 1,3,2,5,3,3,8,6,4,4,9,5,5,5,5,15,13,9,6,6,6,13,7,7,7,7,7,7,20,16,12,
%T A143309 12,8,8,8,8,21,15,15,9,9,9,9,9,9,27,23,15,15,15,10,10,10,10,10,21,11,
%U A143309 11,11,11,11,11,11,11,11,11,40,36,32,26,18,18,12,12,12,12,12,12,25,13,13,13,13,13,13,13,13,13,13,13,13
%N A143309 Triangle read by rows, A054525 * A143308, 1<=k<=n.
%C A143309 Row sums = A069097: (1, 5, 11, 22, 29, 55,...).
%C A143309 Left border = A018804: (1, 3, 5, 8, 9, 15,...).
%F A143309 Mobius transform of triangle A143308.
%e A143309 First few rows of the triangle =
%e A143309 1;
%e A143309 3, 2;
%e A143309 5, 3, 3;
%e A143309 8, 6, 4, 4;
%e A143309 9, 5, 5, 5, 5;
%e A143309 15, 13, 9, 6, 6, 6;
%e A143309 13, 7, 7, 7, 7, 7, 7;
%e A143309 ...
%Y A143309 Cf. A018804, A069097, A143308.
%K A143309 nonn,tabl
%O A143309 1,2
%A A143309 _Gary W. Adamson_, Aug 06 2008
%E A143309 a(56) = 10 removed and more terms from _Georg Fischer_, Jul 13 2023