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A179539
a(0)=1, a(1)=0, a(n)=2n(a(n-1)+a(n-2)), n>1.
0
1, 0, 4, 24, 224, 2480, 32448, 488922, 8343040, 158976576, 3346392320, 77118115712, 1931148192768, 52214924020480, 1516090021970944, 47049148379742720
OFFSET
0,3
EXAMPLE
a(2)= 4*(0+1)=4, a(3)=6*(4+0)=24, a(4)=8*(24+4)=224...
CROSSREFS
Sequence in context: A183279 A145237 A034256 * A277612 A216857 A318005
KEYWORD
nonn
AUTHOR
Gary Detlefs, Jul 18 2010
EXTENSIONS
Definition corrected by Bruno Berselli, Jul 20 2010
STATUS
approved