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), (0, 1, 1), (1, -1, 0)}.
A148257
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), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =14a(5) =32a(6) =109a(7) =299a(8) =1072a(9) =3127a(10) =11729a(11) =35401a(12) =136309a(13) =431530a(14) =1666485a(15) =5448195a(16) =21434385a(17) =71080336a(18) =283731780a(19) =960318349a(20) =3844483980a(21) =13259899319a(22) =53468280540a(23) =186240380637a(24) =757851614915
External references
- oeis: A148257