A123810 Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1x8.

1, 40, 5425, 853908, 147609509, 27054419032

Offset

1,2

Links

Table of n, a(n) for n=1..6.

Crossrefs

Cf. A112389, A123762 - A123827, A123829 - A123849.

Sequence in context: A259461 A229692 A270053 * A275655 A146198 A159376

Adjacent sequences: A123807 A123808 A123809 * A123811 A123812 A123813

Keyword

nonn,hard

Author

Søren Eilers, Oct 29 2006

Status

approved