|
Search: id:A001933
|
|
|
| A001933 |
|
Chessboard polyominoes with n squares.
(Formerly M0171 N0066)
|
|
+0
1
|
|
| 2, 1, 4, 7, 24, 62, 216, 710, 2570, 9215, 34146, 126853, 477182
(list; graph; listen)
|
|
|
OFFSET
|
1,1
|
|
|
REFERENCES
|
W. F. Lunnon, personal communication.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
|
|
CROSSREFS
|
Adjacent sequences: A001930 A001931 A001932 this_sequence A001934 A001935 A001936
Sequence in context: A007839 A045625 A146004 this_sequence A038557 A011234 A128412
|
|
KEYWORD
|
hard,nonn
|
|
AUTHOR
|
N. J. A. Sloane (njas(AT)research.att.com).
|
|
|
Search completed in 0.002 seconds
|
