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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
1, 6, 74, 1257, 25379, 544108, 12037738
OFFSET
1,2
REFERENCES
Computed by Brendan Owen.
LINKS
Andrew Clarke, Other Polyforms
Sean A. Irvine, Java program (github)
CROSSREFS
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