Sequence M_n arising in enumeration of arrays of directed blocks (see 2007 Quaintance reference for precise definition). [The next term is not an integer.].
A129872
Sequence M_n arising in enumeration of arrays of directed blocks (see 2007 Quaintance reference for precise definition). [The next term is not an integer.].
Terms
- a(0) =1a(1) =4a(2) =16a(3) =72a(4) =364a(5) =1916a(6) =10581a(7) =59681a(8) =343903a(9) =2010089
External references
- oeis: A129872