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, 0), (-1, 0, 0), (0, 1, 1), (1, 0, 0), (1, 1, -1)}.
A150243
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, 0), (-1, 0, 0), (0, 1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =83a(5) =339a(6) =1410a(7) =6012a(8) =26174a(9) =115142a(10) =514238a(11) =2314469a(12) =10510960a(13) =48065473a(14) =221035780a(15) =1022285164a(16) =4747939570a(17) =22147857201a(18) =103678307003a(19) =486943792720
External references
- oeis: A150243