Number of Greek-key tours on a 4 X n board; i.e., self-avoiding walks on 4 X n grid starting in top left corner.
A046995
Number of Greek-key tours on a 4 X n board; i.e., self-avoiding walks on 4 X n grid starting in top left corner.
Terms
- a(0) =1a(1) =4a(2) =17a(3) =52a(4) =160a(5) =469a(6) =1337a(7) =3750a(8) =10347a(9) =28249a(10) =76382a(11) =204996a(12) =546651a(13) =1449952a(14) =3828232a(15) =10067585a(16) =26384939a(17) =68941126a(18) =179658343a(19) =467084601a(20) =1211812016a(21) =3138075544a(22) =8112667259a(23) =20941558268a(24) =53983767498a(25) =138989629481a(26) =357450757247a(27) =918350963486
External references
- oeis: A046995