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, 0), (0, 1, -1), (1, 0, -1), (1, 0, 1)}.
A149343
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, 0), (0, 1, -1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =41a(5) =156a(6) =616a(7) =2395a(8) =9791a(9) =41089a(10) =171762a(11) =727439a(12) =3144822a(13) =13642362a(14) =59321761a(15) =260946859a(16) =1155680832a(17) =5123803967a(18) =22833022929a(19) =102400459379a(20) =460260024518
External references
- oeis: A149343