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, -1, 1), (1, 0, 1)}.
A148929
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, -1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =27a(5) =100a(6) =358a(7) =1310a(8) =5203a(9) =20335a(10) =80677a(11) =333518a(12) =1368985a(13) =5672051a(14) =24086008a(15) =101939272a(16) =434048472a(17) =1878827928a(18) =8118874522a(19) =35229694110a(20) =154688620523a(21) =678579542296
External references
- oeis: A148929