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A261143 a(n) = H_n(1,2) where H_n is the n-th hyperoperator. 3

%I

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

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

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

%N a(n) = H_n(1,2) where H_n is the n-th hyperoperator.

%C See A054871 for definitions and key links.

%C Sequence is also the decimal expansion of 2989/9000.

%e a(0) = H_0(1,2) = 2+1 = 3;

%e a(1) = H_1(1,2) = 1+2 = 3;

%e a(2) = H_2(1,2) = 1*2 = 2;

%e a(3) = H_3(1,2) = 1^2 = 1;

%e a(4) = H_4(1,2) = 1^^2 = 1.

%Y Cf. A054871.

%K nonn,cons

%O 0,1

%A _Natan Arie Consigli_, Aug 24 2015

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Last modified October 26 18:30 EDT 2021. Contains 348268 sequences. (Running on oeis4.)