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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A002369 Number of ways of folding a strip of n rectangular stamps.

Original entry on oeis.org

1, 2, 3, 8, 18, 44, 115, 294, 783
Offset: 1

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Author

N. J. A. Sloane

Keywords

Comments

Is this an erroneous version of A056780? It is unclear why one of the 9 polyominoes counted in A056780(4) should be omitted here. Devisme writes in his article that errors are likely and he cannot guarantee the exact figures but only "the order of magnitude". - M. F. Hasler, Feb 24 2018
This is different from A056780 because the polyominoes can split off (beginning at A056780(4)) while a strip of stamps always has 2 ends. - Eric Fox, Sep 01 2019

References

  • 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

Crossrefs

Cf. A056780, A326301.
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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