A057783 Building block is 2 hexagons side-by-side; sequence gives number of pieces (polydohexes) that can be formed from n such pairs of hexagons.

1, 6, 74, 1257, 25379, 544108, 12037738

Offset

1,2

References

Computed by Brendan Owen.

Links

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

Andrew Clarke, Other Polyforms

Sean A. Irvine, Java program (github)

Crossrefs

Cf. A000228, A000105, A000665.

Sequence in context: A269647 A232330 A269337 * A317344 A357011 A231691

Adjacent sequences: A057780 A057781 A057782 * A057784 A057785 A057786

Keyword

nonn,hard,more,nice

Author

N. J. A. Sloane, Oct 29 2000

Extensions

Link updated by William Rex Marshall, Dec 16 2009

a(7) from Sean A. Irvine, Jul 02 2022

Status

approved