A205100 - OEIS

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A205100

The index j<k such that n divides k!!-j!!, where k is the least index (A204982) for which such j exists.

%I #9 Mar 30 2012 18:58:10

%S 1,1,2,3,3,2,1,4,3,4,5,3,2,1,3,6,3,5,6,4,6,10,2,6,5,1,8,6,5,5,7,8,5,3,

%T 7,8,5,2,6,4,5,6,6,10,3,2,1,6,7,9,3,1,9,8,10,6,6,4,1,7

%N The index j<k such that n divides k!!-j!!, where k is the least index (A204982) for which such j exists.

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

%t (See the program at A204982.)

%Y Cf. A204982, A204892.

%K nonn

%O 1,3

%A _Clark Kimberling_, Jan 22 2012