A002723 Number of rotatable partitions of [n].

1, 1, 1, 1, 2, 2, 3, 3, 5, 6, 8, 9, 11, 14, 19, 22, 28, 34, 44, 52, 63, 78, 99, 119, 144, 178, 219, 265

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• more

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

• R. J. Mathar, Java source code.
• E. M. Wright, Rotatable partitions, J. London Math. Soc., 43 (1968), 501-505, q'(4,inf,n).
• E. M. Wright, Rotatable partitions, J. London Math. Soc., 43 (1968), 501-505. [Annotated scanned copy]

Crossrefs

Cf. A002722.

Extensions

a(17)-a(28) from R. J. Mathar, May 29 2016