A158291 The number of numerical sets S with atom monoid A(S) equal to {0,n+1,n+2,n+3,n+4,...}

1, 2, 3, 6, 10, 20, 37, 74, 140, 280, 542, 1084, 2118, 4236, 8337, 16674

Offset

1,2

Links

Table of n, a(n) for n=1..16.

S. R. Finch, Monoids of natural numbers

S. R. Finch, Monoids of natural numbers, March 17, 2009. [Cached copy, with permission of the author]

J. Marzuola and A. Miller, Counting Numerical Sets with No Small Atoms, arXiv:0805.3493 [math.CO], 2008.

J. Marzuola and A. Miller, Counting numerical sets with no small atoms, J. Combin. Theory A 117 (6) (2010) 650-667.

Crossrefs

Cf. A066062.

Sequence in context: A008929 A066062 A164047 * A045690 A007148 A093371

Adjacent sequences: A158288 A158289 A158290 * A158292 A158293 A158294

Keyword

nonn,more

Author

Steven Finch, Mar 15 2009

Status

approved