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A082407 define u(k) as u(1)=1 u(k)=binomial(2*u(k-1),u(k-1)) (mod k), sequence gives values of k such that u(k)=0. 0

%I

%S 2,12,17,21,26,31,36,42,48,53,60,74,79,84,95,102,107,113,118,123,131,

%T 136,143,151,156,162,167,172,177,185,190,195,201,212,217,224,231,236,

%U 241,246,251,257,267,272,278,293,302,310,315,325,333,339,344,349,354

%N define u(k) as u(1)=1 u(k)=binomial(2*u(k-1),u(k-1)) (mod k), sequence gives values of k such that u(k)=0.

%F It seems that a(n) is asymptotic to c*n with 6.1 < c < 6.2.

%K nonn

%O 1,1

%A _Benoit Cloitre_, Apr 23 2003

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Last modified September 23 12:53 EDT 2020. Contains 337310 sequences. (Running on oeis4.)