Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 0), (-1, 1, 0), (1, 0, 0), (1, 1, -1)}.
A148514
Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 1), (-1, 0, 0), (-1, 1, 0), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =17a(5) =36a(6) =134a(7) =335a(8) =1333a(9) =3732a(10) =15504a(11) =46870a(12) =200458a(13) =640494a(14) =2798585a(15) =9330139a(16) =41453055a(17) =142971527a(18) =643754048a(19) =2282825370a(20) =10391082024a(21) =37709321557a(22) =173189706730a(23) =640888377597
External references
- oeis: A148514