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A272172 Triangle read by rows: T(n,k) in which row n lists the first n terms of A000203 in reverse order. 4

%I #41 Jan 24 2022 16:09:58

%S 1,3,1,4,3,1,7,4,3,1,6,7,4,3,1,12,6,7,4,3,1,8,12,6,7,4,3,1,15,8,12,6,

%T 7,4,3,1,13,15,8,12,6,7,4,3,1,18,13,15,8,12,6,7,4,3,1,12,18,13,15,8,

%U 12,6,7,4,3,1,28,12,18,13,15,8,12,6,7,4,3,1,14,28,12,18,13,15,8,12,6,7,4,3,1,24,14,28

%N Triangle read by rows: T(n,k) in which row n lists the first n terms of A000203 in reverse order.

%F a(n) = A000203(A004736(n)).

%F T(n,k) = A000203(n-k+1).

%e Triangle begins:

%e 1;

%e 3, 1;

%e 4, 3, 1;

%e 7, 4, 3, 1;

%e 6, 7, 4, 3, 1;

%e 12, 6, 7, 4, 3, 1;

%e 8, 12, 6, 7, 4, 3, 1;

%e 15, 8, 12, 6, 7, 4, 3, 1;

%e 13, 15, 8, 12, 6, 7, 4, 3, 1;

%e 18, 13, 15, 8, 12, 6, 7, 4, 3, 1;

%e 12, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1;

%e 28, 12, 18, 13, 15, 8, 12, 6, 7, 4, 3, 1;

%e ...

%Y Mirror of A245093.

%Y Column k gives A000203 starting in row k.

%Y Row sums give A024916.

%Y Cf. A004736, A104887, A272171.

%K nonn,tabl

%O 1,2

%A _Omar E. Pol_, Apr 21 2016

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Last modified September 6 10:51 EDT 2024. Contains 375712 sequences. (Running on oeis4.)