|
Search: id:A082145
|
|
| |
|
| 1, 5, 42, 336, 2640, 20592, 160160, 1244672, 9674496, 75246080, 585761792, 4564377600, 35602145280, 277970595840, 2172375244800, 16992801914880, 133035751833600, 1042374243778560, 8173537721057280, 64136851016908800
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
FORMULA
|
a(n)=(2^(n-1)+0^n/2)C(2n+3, n)
|
|
EXAMPLE
|
a(0)=(2^(-1)+(0^0)/2)C(3,0)=2*(1/2)=1 (use 0^0=1).
|
|
MAPLE
|
Z:=(1-3*z-sqrt(1-4*z))/sqrt(1-4*z)/64: Zser:=series(Z, z=0, 32): seq(coeff(Zser*2^(n+1), z, n), n=4..23); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jan 01 2007
|
|
CROSSREFS
|
Cf. A069723, A082143, A082144.
Adjacent sequences: A082142 A082143 A082144 this_sequence A082146 A082147 A082148
Sequence in context: A065035 A025173 A062021 this_sequence A126765 A024492 A005789
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Paul Barry (pbarry(AT)wit.ie), Apr 06 2003
|
|
|
Search completed in 0.002 seconds
|
