Statements (28)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
integer sequence
|
| gptkbp:author |
gptkb:N._J._A._Sloane
|
| gptkbp:citation |
OEIS:A001187
OEIS:A001349 OEIS:A005195 OEIS:A007146 |
| gptkbp:first_terms |
1
38 4 728 1866256 251548592 26704 66296291072 34496488594848 |
| gptkbp:form |
a(n) = sum_{k=1..n} (-1)^(k+1) * binomial(n-1, k-1) * 2^(k*(n-k)) * a(k)
|
| gptkbp:hasKeyword |
easy
nice nonn |
| gptkbp:hasLink |
https://oeis.org/A006370
|
| gptkbp:hasOEISId |
A006370
|
| https://www.w3.org/2000/01/rdf-schema#label |
OEIS:A006370
|
| gptkbp:offset |
1,3
|
| gptkbp:partOf |
gptkb:OEIS
|
| gptkbp:relatedTo |
connected labeled graphs
|
| gptkbp:sequence |
Number of connected labeled graphs with n nodes
|
| gptkbp:bfsParent |
gptkb:3x+1_problem
|
| gptkbp:bfsLayer |
8
|