%I A062561
%S A062561 0,3,12,45,168,630,2376,9009,34320,131274,503880,1939938,7488432,
%T A062561 28973100,112326480,436268025,1697168160,6611884290,25792489800,
%U A062561 100734001830,393847225200,1541374822260,6037849200240,23671113341850
%N A062561 3*binomial(2n,n-1).
%H A062561 Harry J. Smith, <a href="b062561.txt">Table of n, a(n) for n=0,...,200</
               a>
%o A062561 (PARI) for(n=0,22,print(3*binomial(2*n,n-1)))
%o A062561 (PARI) { for (n=0, 200, write("b062561.txt", n, " ", 3*binomial(2*n, 
               n - 1)) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 
               08 2009]
%Y A062561 Cf. A001791.
%Y A062561 Sequence in context: A005656 A064017 A005320 this_sequence A128593 A085481 
               A030195
%Y A062561 Adjacent sequences: A062558 A062559 A062560 this_sequence A062562 A062563 
               A062564
%K A062561 easy,nonn
%O A062561 0,2
%A A062561 Jason Earls (zevi_35711(AT)yahoo.com), Jul 13 2001