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, 1), (0, 1, -1), (0, 1, 0), (1, -1, 0)}.
A148195
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, 1), (0, 1, -1), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =33a(6) =100a(7) =325a(8) =1104a(9) =3792a(10) =13497a(11) =49704a(12) =184921a(13) =698670a(14) =2696861a(15) =10546611a(16) =41566874a(17) =165928216a(18) =670143962a(19) =2724628286a(20) =11159743259a(21) =46120070208a(22) =191835489614a(23) =801980596598
External references
- oeis: A148195