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, 0), (-1, 0, 0), (1, 1, 0), (1, 1, 1)}.
A150902
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, 0), (-1, 0, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =29a(4) =137a(5) =504a(6) =2427a(7) =9514a(8) =46279a(9) =188378a(10) =922011a(11) =3848325a(12) =18913895a(13) =80375284a(14) =396204897a(15) =1706671449a(16) =8431581777a(17) =36707170694a(18) =181657234959a(19) =797648512851
External references
- oeis: A150902