a(n) is the number of size n Eulerian orientations in L1(1).
A278459
a(n) is the number of size n Eulerian orientations in L1(1).
Terms
- a(0) =1a(1) =2a(2) =10a(3) =66a(4) =466a(5) =3458a(6) =26650a(7) =211458a(8) =1716642a(9) =14193282a(10) =119115818a(11) =1012129602a(12) =8690293618a(13) =75283480834a(14) =657206992954
External references
- oeis: A278459