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The index j<k such that n divides s(k)-s(j) for some j, where s(j)=(1/2)C(2j,j).
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%I #7 Dec 25 2023 18:17:19

%S 1,1,1,2,3,5,2,2,1,5,6,5,4,5,5,2,1,3,6,4,5,6,3,5,3,7,2,5,3,5,10,2,6,1,

%T 1,3,1,6,7,4,2,5,14,6,3,3,5,5,1,4

%N The index j<k such that n divides s(k)-s(j) for some j, where s(j)=(1/2)C(2j,j).

%C For a guide to related sequences, see A204892.

%t (See the program at A205386.)

%Y Cf. A205386, A204892.

%K nonn

%O 1,4

%A _Clark Kimberling_, Jan 27 2012