A123802 Number of ways, counted up to symmetry, to build a contiguous building with n LEGO blocks of size 1x7.

1, 32, 3292, 401408, 53855801, 7664347918

Offset

1,2

Links

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

Crossrefs

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

Sequence in context: A016793 A215045 A219343 * A264057 A221659 A222053

Adjacent sequences: A123799 A123800 A123801 * A123803 A123804 A123805

Keyword

nonn,hard

Author

Søren Eilers, Oct 29 2006

Status

approved