Number of n-step self-avoiding walks on a 2D square lattice where the walk cannot step to the smaller square ring of numbers than the ring it is currently on.
A347990
Number of n-step self-avoiding walks on a 2D square lattice where the walk cannot step to the smaller square ring of numbers than the ring it is currently on.
Terms
- a(0) =1a(1) =4a(2) =12a(3) =36a(4) =92a(5) =252a(6) =628a(7) =1644a(8) =4052a(9) =10340a(10) =25332a(11) =63708a(12) =155452a(13) =387036a(14) =941948a(15) =2328740a(16) =5657236a(17) =13914596a(18) =33757804a(19) =82713164a(20) =200467108a(21) =489746916a(22) =1186060492a(23) =2891000036a(24) =6997192716a(25) =17025058164a(26) =41186981772a(27) =100070851212a(28) =242000513660a(29) =587312389940
External references
- oeis: A347990