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), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
A149041
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), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =10a(4) =36a(5) =137a(6) =553a(7) =2285a(8) =9693a(9) =41855a(10) =183561a(11) =814876a(12) =3654604a(13) =16535384a(14) =75366335a(15) =345737195a(16) =1594970323a(17) =7394406989a(18) =34431368556a(19) =160953486204a(20) =755038939596
External references
- oeis: A149041