OFFSET
1,1
LINKS
Jean-François Alcover, Table of n, a(n) for n = 1..28
Eric Weisstein's World of Mathematics, Polyomino
Wikipedia, Polyomino
FORMULA
a(n) = A001168(2*n).
MATHEMATICA
a[n_] := A001168[[2 n]];
a /@ Range[1, Length[A001168]/2 // Floor] (* Jean-François Alcover, Sep 22 2019 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Omar E. Pol, Sep 16 2012
STATUS
approved