OFFSET
0,2
COMMENTS
a(n) equals 2^(3+2n) times the coefficient of Pi in 2F1(1/2, n+2, 5/2, -1). - John M. Campbell, Jul 17 2011
The array view of A029635 is
2, 2, 2, 2, 2, 2, ...
1, 3, 5, 7, 9, 11, ...
1, 4, 9, 16, 25, 36, ...
1, 5, 14, 30, 55, 91, ...
1, 6, 20, 50, 105, 196, ...
1, 7, 27, 77, 182, 378, ...
and a(n) is the incomplete hook sum Sum_{k=0..n-1} A(n,k) + Sum_{r=0..n-1} A(r,n). - R. J. Mathar, Jun 30 2013
LINKS
Harry J. Smith, Table of n, a(n) for n = 0..200
MATHEMATICA
Table[3*Binomial[2*n, n-1], {n, 0, 25}]
PROG
(PARI) for(n=0, 22, print(3*binomial(2*n, n-1)))
(PARI) { for (n=0, 200, write("b062561.txt", n, " ", 3*binomial(2*n, n - 1)) ) } \\ Harry J. Smith, Aug 08 2009
(Magma) [3*n*Catalan(n): n in [0..30]]; // Vincenzo Librandi, Jul 19 2011
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jason Earls, Jul 13 2001
STATUS
approved