a(n) is the total number of vertices of degree 1 in Catalan word grid graphs with n parts.
A390111
a(n) is the total number of vertices of degree 1 in Catalan word grid graphs with n parts.
Terms
- a(0) =4a(1) =10a(2) =29a(3) =91a(4) =300a(5) =1023a(6) =3575a(7) =12727a(8) =45968a(9) =167960a(10) =619514a(11) =2302990a(12) =8617640a(13) =32427585a(14) =122611275a(15) =465542655a(16) =1774086600a(17) =6782469540a(18) =26004015510a(19) =99953651850a(20) =385077767880
External references
- oeis: A390111