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, 0), (-1, -1, 1), (-1, 1, -1), (1, 0, 1)}.
A148060
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, 0), (-1, -1, 1), (-1, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =12a(5) =25a(6) =77a(7) =161a(8) =676a(9) =1629a(10) =5631a(11) =13233a(12) =56856a(13) =146445a(14) =534726a(15) =1335663a(16) =5817552a(17) =15578341a(18) =58752167a(19) =152411825a(20) =669911668a(21) =1840568181a(22) =7092254088a(23) =18880772519a(24) =83533908814a(25) =233748333865a(26) =914652294617
External references
- oeis: A148060