A114178 - OEIS

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A114178

Central terms of triangle A114176 found in even-indexed rows.

%I #3 Mar 30 2012 18:36:52

%S 1,3,18,135,1083,9219,80631,724080,6601639,61065270,570430258,

%T 5376309654,51020229343,487127706521,4674459993450,45056351087502,

%U 435965482847738,4232871507349381,41222355832803426,402540756184423291

%N Central terms of triangle A114176 found in even-indexed rows.

%Y Cf. A114176, A114177 (row sums), A114179 (row sums-square).

%K nonn

%O 0,2

%A _Paul D. Hanna_, Nov 15 2005