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A152907 Irregular triangle read by rows, numbers in A007318 repeated four times . 0

%I

%S 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,2,2,2,2,1,1,1,1,1,1,1,1,3,3,3,3,3,3,

%T 3,3,1,1,1,1,1,1,1,1,4,4,4,4,6,6,6,6,4,4,4,4,1,1,1,1,1,1,1,1,5,5,5,5,

%U 10,10,10,10,10,10,10,10,5,5,5,5,1,1,1,1,1,1,1,1,6,6,6,6,15,15,15,15,20,20

%N Irregular triangle read by rows, numbers in A007318 repeated four times .

%F Sum_{k, 0<=k<=4n+3}T(n,k)=2^(n+2).

%e Triangle begins : 1,1,1,1 ; 1,1,1,1,1,1,1,1 ; 1,1,1,1,2,2,2,2,1,1,1,1 ; 1,1,1,1,3,3,3,3,3,3,3,3,1,1,1,1, ; 1,1,1,1,4,4,4,4,6,6,6,6,4,4,4,4,1,1,1,1 ; 1,1,1,1,5,5,5,5,10,10,10,10,10,10,10,10,5,5,5,5,1,1,1,1 ; ...

%Y Cf. A007318, A152905, A152906

%K nonn,tabf

%O 0,17

%A _Philippe Deléham_, Dec 14 2008

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Last modified July 30 15:29 EDT 2021. Contains 346359 sequences. (Running on oeis4.)