Statements (30)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
integer sequence
|
| gptkbp:author |
gptkb:N._J._A._Sloane
|
| gptkbp:citation |
A001187
A001349 A005195 A007146 |
| gptkbp:describedBy |
https://oeis.org/A006368
|
| gptkbp:field |
graph theory
|
| gptkbp:firstTermCorrespondsTo |
n=1
|
| gptkbp:form |
a(n) = sum_{k=1..n} (-1)^(k+1) * binomial(n-1, k-1) * 2^(k*(n-k)) * a(n-k)
|
| gptkbp:hasKeyword |
easy
nice nonn |
| https://www.w3.org/2000/01/rdf-schema#label |
A006368
|
| gptkbp:name |
Number of connected labeled graphs with n nodes
|
| gptkbp:OEIS |
gptkb:A006368
|
| gptkbp:relatedTo |
connected labeled graphs
|
| gptkbp:sequence |
1
38 4 728 1866256 251548592 26704 34496488594896 66296291072 35641657583727360 73068594072691549696 |
| gptkbp:bfsParent |
gptkb:Conway's_RATS_sequence
|
| gptkbp:bfsLayer |
6
|