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A232994
a(n) = 6*(n - 3)*(n - 4)*2^(n-3)*n^(n-4).
1
0, 0, 240, 10368, 395136, 15728640, 680244480, 32256000000, 1676208500736, 95105071448064, 5863863973294080, 390979732037959680, 28060084800000000000, 2158269056624017539072, 177206054288314912014336, 15475174380451335052984320, 1432670891083019685105500160, 140187732541440000000000000000
OFFSET
3,3
LINKS
Andrei Asinowski, Gill Barequet, Ronnie Barequet, Gunter Rote, Proper n-Cell Polycubes in n-3 Dimensions, J. Int. Seq. 15 (2012) #12.8.4.
CROSSREFS
Cf. A232995.
Sequence in context: A187167 A282227 A268902 * A023906 A292883 A292075
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Dec 16 2013
EXTENSIONS
The Asinowski et al. paper contains 10 or 20 further sequences similar to this one, that could be added to the OEIS. I don't have time to do this myself.
STATUS
approved