Sequence a_n arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition).
A129878
Sequence a_n arising in enumeration of arrays of directed blocks (see Quaintance reference for precise definition).
Terms
- a(0) =1a(1) =3a(2) =10a(3) =42a(4) =178a(5) =787a(6) =3552a(7) =16319a(8) =76032a(9) =358394a(10) =1706251a(11) =8193321a(12) =39641852a(13) =193085107a(14) =946088197a(15) =4660551304a(16) =23069512548a(17) =114693318822a(18) =572485658453
External references
- oeis: A129878