A056840

[David Wasserman]

Dear Seqfans,
      I think A056840 looks like an incorrect version of A030222.  Does
anyone have a better explanation for it?
   - David


%I A056840
%S A056840 1,2,5,22,99,580
%N A056840 Rounded n-celled polyominoes.
%C A056840 There are n cells, drawn on a square grid, pointwise
connected; polyominoes may be rotated by 90 degrees and\
     turned over.
%H A056840 M. Vicher, <a
href="http://alpha.ujep.cz/~vicher/puzzle/polyforms.htm">Polyforms</a>
%H A056840 M. Vicher, <a
href="http://www.research.att.com/~njas/sequences/a056840.gif">The 22
4-celled rounded polyomi\
    noes</a>
%Y A056840 Sequence in context: A041006 A083465 A030222 this_sequence
A041807 A015557 A066305
%Y A056840 Adjacent sequences: A056837 A056838 A056839 this_sequence
A056841 A056842 A056843
%K A056840 nice,nonn
%O A056840 1,2
%A A056840 James A. Sellers (sellersj(AT)math.psu.edu), Aug 28 2000
%E A056840 Edited by njas, Jun 21 2001



%I A030222
%S A030222 1,2,5,22,94,524,3031,18770,118133,758381,4915652,32149296,211637205,
%T A030222 1401194463,9321454604,62272330564,417546684096
%N A030222 n-polyplets (polyominoes connected at edges or corners);
may contain holes.
%D A030222 Computed by Matthew Cook (cook(AT)wolfram.com); extended
by David W. Wilson
%H A030222 E. W. Weisstein, <a
href="http://mathworld.wolfram.com/Polyplet.html">Link to a section
of The World of Math\
    ematics.</a>
%e A030222 XXX..XX...XX..X.X..X.. (the 5 for n=3)
%e A030222 .......X...X...X....X.
%e A030222 .....................X
%Y A030222 Cf. A006770.
%Y A030222 Sequence in context: A041165 A041006 A083465 this_sequence
A056840 A041807 A015557
%Y A030222 Adjacent sequences: A030219 A030220 A030221 this_sequence
A030223 A030224 A030225
%K A030222 nonn,hard,nice
%O A030222 1,2
%A A030222 Matthew Cook (cook(AT)wolfram.com)
%E A030222 More terms from Joseph Myers (jsm28(AT)cam.ac.uk), Sep 26 2002