A123794 Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1x6.

1, 24, 1861, 168661, 16902651, 1797062518, 199090941069

Offset

1,2

Links

Table of n, a(n) for n=1..7.

Crossrefs

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

Sequence in context: A227257 A222999 A166788 * A269648 A269338 A003738

Adjacent sequences: A123791 A123792 A123793 * A123795 A123796 A123797

Keyword

nonn,hard

Author

Søren Eilers, Oct 29 2006

Status

approved