A261006 Number of unlabeled connected simplicial complexes with n nodes.

1, 1, 1, 3, 14, 157, 15942, 489980450, 1392195547909966848, 789204635842035012967539870068113408

Offset

0,4

Comments

Inverse Euler transform of A261005 (omitting the a(0) term from A261005).

a(0) could equally well be taken to be 0.

References

Benoît Jubin, Posting to Sequence Fans Mailing List, Aug 12 2015

Links

Table of n, a(n) for n=0..9.

Greg Huber, Letters to N. J. A. Sloane, May 1983 [Annotated, corrected, scanned copy]

N. J. A. Sloane, Transforms

Crossrefs

Cf. A261005, A006602.

Sequence in context: A002966 A075654 A330603 * A185238 A090897 A120459

Adjacent sequences: A261003 A261004 A261005 * A261007 A261008 A261009

Keyword

nonn,more,hard

Author

N. J. A. Sloane, Aug 13 2015

Extensions

a(8)-a(9) from Dmitry I. Ignatov, Nov 26 2023

Status

approved