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A238303 Triangle T(n,k), 0<=k<=n, read by rows given by T(n,0) = 1, T(n,k) = 2 if k>0. 3

%I #7 Jun 26 2022 17:31:16

%S 1,1,2,1,2,2,1,2,2,2,1,2,2,2,2,1,2,2,2,2,2,1,2,2,2,2,2,2,1,2,2,2,2,2,

%T 2,2,1,2,2,2,2,2,2,2,2,1,2,2,2,2,2,2,2,2,2,1,2,2,2,2,2,2,2,2,2,2,1,2,

%U 2,2,2,2,2,2,2,2,2,2,1,2,2,2,2,2,2,2

%N Triangle T(n,k), 0<=k<=n, read by rows given by T(n,0) = 1, T(n,k) = 2 if k>0.

%C Row sums are A005408(n).

%C Diagonals sums are A109613(n).

%C Sum_{k=0..n} T(n,k)*x^k = A033999(n), A000012(n), A005408(n), A036563(n+2), A058481(n+1), A083584(n), A137410(n), A233325(n), A233326(n), A233328(n), A211866(n+1), A165402(n+1) for x = -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 respectively.

%C Sum_{k=0..n} T(n,k)*x^(n-k) = A151575(n), A000012(n), A040000(n), A005408(n), A033484(n), A048473(n), A020989(n), A057651(n), A061801(n), A238275(n), A238276(n), A138894(n), A090843(n), A199023(n) for x = -2, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 respectively.

%C Sum_{k=0..n} T(n,k)^x = A000027(n+1), A005408(n), A016813(n), A017077(n) for x = 0, 1, 2, 3 respectively.

%C Sum_{k=0..n} k*T(n,k) = A002378(n).

%C Sum_{k=0..n} A000045(k)*T(n,k) = A019274(n+2).

%C Sum_{k=0..n} A000142(k)*T(n,k) = A066237(n+1).

%F T(n,0) = A000012(n) = 1, T(n+k,k) = A007395(n) = 2 for k>0.

%e Triangle begins:

%e 1;

%e 1, 2;

%e 1, 2, 2;

%e 1, 2, 2, 2;

%e 1, 2, 2, 2, 2;

%e 1, 2, 2, 2, 2, 2;

%e 1, 2, 2, 2, 2, 2, 2;

%e 1, 2, 2, 2, 2, 2, 2, 2;

%e 1, 2, 2, 2, 2, 2, 2, 2, 2;

%e 1, 2, 2, 2, 2, 2, 2, 2, 2, 2;

%e 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2;

%e 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2;

%e ...

%Y Cf. Diagonals: A040000.

%Y Cf. Columns: A000012, A007395.

%Y First differences of A001614.

%K easy,nonn,tabl

%O 0,3

%A _Philippe Deléham_, Feb 24 2014

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Last modified March 29 10:22 EDT 2024. Contains 371268 sequences. (Running on oeis4.)