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), (-1, 1, 1), (0, 1, 0), (1, -1, 0), (1, 1, -1)}.
A148367
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), (-1, 1, 1), (0, 1, 0), (1, -1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =50a(6) =184a(7) =701a(8) =2795a(9) =11495a(10) =48458a(11) =208599a(12) =913446a(13) =4056442a(14) =18230522a(15) =82764668a(16) =379005858a(17) =1748636487a(18) =8120470721a(19) =37926160085a(20) =178024257835a(21) =839368322732
External references
- oeis: A148367