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A061930 Square array read by antidiagonals of T(n,k)=T(n-1,[k/2])+T(n-1,[k/3]) with T(0,0)=1. 2

%I #5 Mar 30 2012 18:51:34

%S 1,0,2,0,2,4,0,1,4,8,0,0,4,8,16,0,0,4,8,16,32,0,0,3,8,16,32,64,0,0,3,

%T 8,16,32,64,128,0,0,1,8,16,32,64,128,256,0,0,1,8,16,32,64,128,256,512,

%U 0,0,1,8,16,32,64,128,256,512,1024,0,0,0,7,16,32,64,128,256,512,1024

%N Square array read by antidiagonals of T(n,k)=T(n-1,[k/2])+T(n-1,[k/3]) with T(0,0)=1.

%e T(9, 7) = T(8, [7/2])+T(8, [7/3]) = T(8, 3)+T(8, 2) = 256+256 = 512. Rows start (1, 0, 0, 0, 0, ...), (2, 2, 1, 0, 0, ...), (4, 4, 4, 4, 3, ...) etc.

%Y Row sums are 5^n, i.e. A000351. Each row starts with 2^n copies of 2^n, i.e. A000079 and then continues with A036561 copies of other terms in the rows of A055248. Cf. A061929.

%K nonn,tabl

%O 0,3

%A _Henry Bottomley_, May 22 2001

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Last modified August 28 06:46 EDT 2024. Contains 375477 sequences. (Running on oeis4.)