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), (0, 0, 1), (0, 1, -1), (1, 0, -1)}.
A148502
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), (0, 0, 1), (0, 1, -1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =15a(5) =33a(6) =119a(7) =307a(8) =1145a(9) =3121a(10) =11951a(11) =35141a(12) =139831a(13) =427607a(14) =1714441a(15) =5420309a(16) =22183715a(17) =72324439a(18) =298824829a(19) =993349021a(20) =4142872043a(21) =14065088951a(22) =59209316301a(23) =204041427767a(24) =863673823849
External references
- oeis: A148502