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, 1), (0, 1, 0), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
A150628
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, 1), (0, 1, 0), (0, 1, 1), (1, -1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =114a(5) =504a(6) =2294a(7) =10656a(8) =50218a(9) =239227a(10) =1149063a(11) =5554590a(12) =26988272a(13) =131667326a(14) =644515544a(15) =3163659940a(16) =15564904380a(17) =76726441320a(18) =378841644950
External references
- oeis: A150628