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A018244 A self-generating sequence: there are a(n) (k+1)'s between successive k's, where k=3. 2

%I #6 May 20 2014 14:54:16

%S 3,4,4,4,3,4,4,4,4,3,4,4,4,4,3,4,4,4,4,3,4,4,4,3,4,4,4,4,3,4,4,4,4,3,

%T 4,4,4,4,3,4,4,4,4,3,4,4,4,3,4,4,4,4,3,4,4,4,4,3,4,4,4,4,3,4,4,4,4,3,

%U 4,4,4,3,4,4,4,4,3,4,4,4

%N A self-generating sequence: there are a(n) (k+1)'s between successive k's, where k=3.

%p k := 3; A018244 := proc(n) global k; floor(n*(k+sqrt(k^2+4*k))/2)-floor((n-1)*(k+sqrt(k^2+4*k))/2); end;

%Y Cf. A001468, A007538.

%K nonn

%O 1,1

%A _Jonas Wallgren_

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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)