A002722 Rotatable partitions. (Formerly M0238 N0081)

1, 1, 1, 2, 2, 2, 4, 6, 6, 8, 11, 13, 17, 24, 28, 36, 47, 56, 69, 94, 114, 138, 177, 218, 262, 333, 410, 496, 615, 755, 906, 1120, 1372, 1648, 2006, 2455, 2939, 3557

Offset

1,4

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

Table of n, a(n) for n=1..38.

R. J. Mathar, Java source code

E. M. Wright, Rotatable partitions, J. London Math. Soc., 43 (1968), 501-505.

E. M. Wright, Rotatable partitions, J. London Math. Soc., 43 (1968), 501-505. [Annotated scanned copy]

Crossrefs

Sequence in context: A292728 A365719 A096575 * A261610 A265251 A336032

Adjacent sequences: A002719 A002720 A002721 * A002723 A002724 A002725

Keyword

nonn,more

Author

N. J. A. Sloane

Extensions

a(17)-a(38) from R. J. Mathar, May 29 2016

Status

approved