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, 0, 1), (-1, 1, 1), (1, 0, -1), (1, 0, 1)}.
A149306
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, 0, 1), (-1, 1, 1), (1, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =11a(4) =48a(5) =157a(6) =711a(7) =2559a(8) =11846a(9) =45183a(10) =212143a(11) =840277a(12) =3984616a(13) =16205687a(14) =77410374a(15) =321065635a(16) =1542228908a(17) =6494244945a(18) =31332380867a(19) =133546094665a(20) =646603376846
External references
- oeis: A149306