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 A158821 Triangle read by rows: row n (n>=0) ends with 1, and for n>=1 begins with n; other entries are zero. 8

%I

%S 1,1,1,2,0,1,3,0,0,1,4,0,0,0,1,5,0,0,0,0,1,6,0,0,0,0,0,1,7,0,0,0,0,0,

%T 0,1,8,0,0,0,0,0,0,0,1,9,0,0,0,0,0,0,0,0,1,10,0,0,0,0,0,0,0,0,0,1,11,

%U 0,0,0,0,0,0,0,0,0,0,1,12,0,0,0,0,0,0,0,0,0,0,0,1,13,0,0,0,0,0,0,0,0,0,0,0

%N Triangle read by rows: row n (n>=0) ends with 1, and for n>=1 begins with n; other entries are zero.

%F T(n,k) = A145677(n,n-k-1). [From _R. J. Mathar_, Apr 01 2009]

%e Triangle begins:

%e 1

%e 1, 1

%e 2, 0, 1

%e 3, 0, 0, 1

%e 4, 0, 0, 0, 1

%e 5, 0, 0, 0, 0, 1

%e 6, 0, 0, 0, 0, 0, 1

%e 7, 0, 0, 0, 0, 0, 0, 1

%p A158821 := proc(n,k)

%p if n = k then

%p 1;

%p elif k = 0 then

%p n ;

%p else

%p 0 ;

%p end if;

%p end proc: # _R. J. Mathar_, Jan 08 2015

%K nonn,tabl,easy

%O 0,4

%A _Gary W. Adamson_, Mar 30 2008

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Last modified June 24 06:16 EDT 2021. Contains 345416 sequences. (Running on oeis4.)