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, 0), (-1, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, -1)}.
A148024
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, 0), (-1, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =17a(6) =48a(7) =122a(8) =385a(9) =1085a(10) =3375a(11) =10198a(12) =33933a(13) =108092a(14) =360915a(15) =1200813a(16) =4160537a(17) =14151588a(18) =49403091a(19) =173696887a(20) =621438061a(21) =2207940184a(22) =7968530425a(23) =29011615994a(24) =106385931309a(25) =389703992683
External references
- oeis: A148024