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, -1, 1), (-1, 1, 0), (1, 0, -1), (1, 0, 0)}.
A148023
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, -1, 1), (-1, 1, 0), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =17a(6) =48a(7) =112a(8) =375a(9) =995a(10) =3275a(11) =8876a(12) =31891a(13) =94113a(14) =332788a(15) =988399a(16) =3711314a(17) =11670675a(18) =43086404a(19) =135569589a(20) =524171391a(21) =1721594540a(22) =6545887952a(23) =21443044036a(24) =84642973041a(25) =286949416617
External references
- oeis: A148023