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A105594 Triangle read by rows: abs(A103447)*A047999 mod 2. 6

%I #21 Jan 15 2020 07:45:09

%S 1,0,1,1,1,1,0,0,0,1,1,0,1,0,1,0,1,0,1,0,1,0,0,0,0,1,1,1,0,0,0,0,0,0,

%T 0,1,1,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,0,1,1,0,0,0,0,0,0,1,0,0,1,1,0,0,

%U 0,1,0,0,0,1,0,0,0,1,0,0,0,0,1,0,0,0,0,0,1,0,1,0,1,0,0,1,1,0,0,1,1,0,1,0,1

%N Triangle read by rows: abs(A103447)*A047999 mod 2.

%C Row sums are A105595.

%H Robert Israel, <a href="/A105594/b105594.txt">Table of n, a(n) for n = 0..10010</a> (rows 0 to 140, flattened)

%F T(n, k) = mod(Sum_{j=0..n}(abs(mu(binomial(n,j)))*mod(binomial(j,k),2)), 2).

%e Triangle starts

%e 1;

%e 0,1;

%e 1,1,1;

%e 0,0,0,1;

%e 1,0,1,0,1;

%e 0,1,0,1,0,1;

%e 0,0,0,0,1,1,1;

%p A105594 := proc(n,k)

%p add( abs(numtheory[mobius](binomial(n,j)))*modp(binomial(j,k),2) ,j=0..n) ;

%p % mod 2 ;

%p end proc: # _R. J. Mathar_, Nov 28 2014

%t T[n_, k_] := Sum[Abs[MoebiusMu[Binomial[n, j]]*Mod[Binomial[j, k], 2]], {j, 0, n}] // Mod[#, 2]&;

%t Table[T[n, k], {n, 0, 13}, {k, 0, n}] // Flatten (* _Jean-François Alcover_, Jan 15 2020 *)

%Y Cf. A047999, A103447, A105595, A105596.

%K easy,nonn,tabl

%O 0,1

%A _Paul Barry_, Apr 14 2005

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Last modified April 19 18:05 EDT 2024. Contains 371798 sequences. (Running on oeis4.)