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A138895 Triangle read by rows: T(n,k) = A092892(n-k) for 0 <= k <= n. 3

%I #12 Jul 29 2023 03:01:39

%S 1,2,1,4,2,1,8,4,2,1,5,8,4,2,1,3,5,8,4,2,1,6,3,5,8,4,2,1,12,6,3,5,8,4,

%T 2,1,24,12,6,3,5,8,4,2,1,17,24,12,6,3,5,8,4,2,1,11,17,24,12,6,3,5,8,4,

%U 2,1

%N Triangle read by rows: T(n,k) = A092892(n-k) for 0 <= k <= n.

%C Matrix in Toeplitz form related to the Collatz (3x + 1) algorithm.

%C Row sums are A138847. Antidiagonal sums are A138848.

%e Triangle begins

%e 1;

%e 2, 1;

%e 4, 2, 1;

%e 8, 4, 2, 1;

%e 5, 8, 4, 2, 1;

%e 3, 5, 8, 4, 2, 1;

%e 6, 3, 5, 8, 4, 2, 1;

%e 12, 6, 3, 5, 8, 4, 2, 1;

%e 24, 12, 6, 3, 5, 8, 4, 2, 1;

%e 17, 24, 12, 6, 3, 5, 8, 4, 2, 1;

%e 11, 17, 24, 12, 6, 3, 5, 8, 4, 2, 1;

%e ...

%Y Cf. A092892 (1st column), A138847, A138848.

%K easy,nonn,tabl

%O 0,2

%A _Paul Barry_, Apr 02 2008

%E Edited by _Georg Fischer_, Jul 28 2023

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Last modified March 29 04:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)