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A054526 Triangle T(n,k): T(n,k) = phi(k) (n >= 1, 1 <= k <= n). 0

%I

%S 1,1,1,1,1,2,1,1,2,2,1,1,2,2,4,1,1,2,2,4,2,1,1,2,2,4,2,6,1,1,2,2,4,2,

%T 6,4,1,1,2,2,4,2,6,4,6,1,1,2,2,4,2,6,4,6,4,1,1,2,2,4,2,6,4,6,4,10,1,1,

%U 2,2,4,2,6,4,6,4,10,4,1,1,2,2,4,2,6,4,6,4,10,4,12

%N Triangle T(n,k): T(n,k) = phi(k) (n >= 1, 1 <= k <= n).

%p seq(seq(phi(k), k=1..n), n=0..13); # _Zerinvary Lajos_, Oct 07 2007

%Y Cf. A054521.

%K nonn,tabl

%O 1,6

%A _N. J. A. Sloane_, Apr 09 2000

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Last modified January 31 03:33 EST 2023. Contains 359947 sequences. (Running on oeis4.)