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, 0, 0), (-1, 1, 1), (0, -1, 1), (0, 1, 0), (1, 0, -1)}.
A148165
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, 0, 0), (-1, 1, 1), (0, -1, 1), (0, 1, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =31a(6) =99a(7) =320a(8) =1107a(9) =3917a(10) =14398a(11) =53921a(12) =206822a(13) =806398a(14) =3196349a(15) =12836214a(16) =52180956a(17) =214379114a(18) =889187595a(19) =3719706413a(20) =15680492493a(21) =66565341993a(22) =284375168428
External references
- oeis: A148165