cp's OEIS Frontend

A136099 Triangle read by rows: the number of ways to factor 5*2^(n-k)*3^k, columns 0<=k<=n, rows n>=0.

%I A136099 #12 Aug 04 2021 20:28:43
%S A136099 1,2,2,4,5,4,7,11,11,7,12,21,26,21,12,19,38,52,52,38,19,30,64,98,109,
%T A136099 98,64,30,45,105,171,212,212,171,105,45,67,165,289,382,424,382,289,
%U A136099 165,67,97,254,467,662,783,783,662,467,254,97,139,381,737,1097,1386,1481,1386,1097,737,381,139
%N A136099 Triangle read by rows: the number of ways to factor 5*2^(n-k)*3^k, columns 0<=k<=n, rows n>=0.
%C A136099 Second in the series of arrays beginning with A054225.
%F A136099 T(n,k) = A001055(5*A036561(n,k)).
%e A136099 5*A036561(2,1) = 5*6 = 30 and there are five ways to factor 30.
%e A136099 Triangle begins:
%e A136099    1;
%e A136099    2,  2;
%e A136099    4,  5,  4;
%e A136099    7, 11, 11,   7;
%e A136099   12, 21, 26,  21, 12;
%e A136099   19, 38, 52,  52, 38, 19;
%e A136099   30, 64, 98, 109, 98, 64, 30;
%e A136099   ...
%Y A136099 Cf. A001055, A036561, A054225, A129306, A131419.
%K A136099 nonn,tabl
%O A136099 0,2
%A A136099 _Alford Arnold_, Dec 15 2007