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, 1), (-1, 1, 1), (0, 0, -1), (1, 0, 0)}.
A148162
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, 1), (-1, 1, 1), (0, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =31a(6) =91a(7) =267a(8) =813a(9) =2557a(10) =8236a(11) =26786a(12) =87847a(13) =291227a(14) =977068a(15) =3308866a(16) =11278661a(17) =38653717a(18) =133227658a(19) =461825572a(20) =1608935543a(21) =5628584683a(22) =19762998641a(23) =69637415101a(24) =246214217449a(25) =873256171561
External references
- oeis: A148162