|
|
A034270
|
|
f(n,n+3) where f is given in A034261.
|
|
1
|
|
|
0, 1, 13, 99, 605, 3289, 16653, 80444, 375972, 1715130, 7681586, 33913385, 148018455, 640049865, 2746422525, 11708971560, 49647131160, 209523969630, 880668859590, 3688555690950, 15401089588794, 64128925255626, 266376231244178, 1104047701891624, 4566956385797400
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,3
|
|
LINKS
|
|
|
FORMULA
|
|
|
MATHEMATICA
|
Table[n*(n^2+4*n+1)*Binomial[2*n+3, n]/((n+4)*(n+5)), {n, 0, 20}] (* Vaclav Kotesovec, Oct 27 2012 *)
|
|
PROG
|
(Magma) [n*(n^2+4*n+1)*Binomial(2*n+3, n)/((n+4)*(n+5)): n in [0..25]]; // Vincenzo Librandi, May 04 2013
(PARI) a(n)=n*(n^2+4*n+1)*binomial(2*n+3, n)/((n+4)*(n+5)); \\ Joerg Arndt, May 04 2013
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
|
|
EXTENSIONS
|
|
|
STATUS
|
approved
|
|
|
|