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, -1, 1), (-1, 1, 1), (0, 1, 1), (1, 0, -1)}.
A148446
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, -1, 1), (-1, 1, 1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =17a(5) =49a(6) =170a(7) =567a(8) =1938a(9) =7048a(10) =25692a(11) =94221a(12) =355939a(13) =1358403a(14) =5196687a(15) =20169943a(16) =79178940a(17) =311341768a(18) =1233884011a(19) =4934811327a(20) =19786170788a(21) =79683695476a(22) =323069731308
External references
- oeis: A148446