|
| |
|
|
A001010
|
|
Number of symmetric foldings of a strip of n stamps.
(Formerly M0323 N0120)
|
|
2
| |
|
|
1, 2, 2, 4, 6, 8, 18, 20, 56, 48, 178, 132, 574, 348, 1870, 1008, 6144, 2812, 20314, 8420, 67534, 24396, 225472, 74756, 755672, 222556, 2540406, 693692, 8564622, 2107748, 28941258, 6656376, 98011464, 20548932
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,2
|
|
|
REFERENCES
| J. E. Koehler, Folding a strip of stamps, J. Combin. Theory, 5 (1968), 135-152.
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).
|
|
|
LINKS
| Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.
Index entries for sequences obtained by enumerating foldings
|
|
|
CROSSREFS
| Cf. A007822, A000682.
Sequence in context: A145465 A153958 A153964 * A091966 A055529 A035564
Adjacent sequences: A001007 A001008 A001009 * A001011 A001012 A001013
|
|
|
KEYWORD
| nonn,nice
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), legendre(AT)biologie.ens.fr (Stephane LEGENDRE)
|
| |
|
|
