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), (1, 0, -1), (1, 0, 0), (1, 0, 1)}.
A150370
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), (1, 0, -1), (1, 0, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =23a(4) =94a(5) =366a(6) =1572a(7) =6510a(8) =29057a(9) =126170a(10) =573577a(11) =2550329a(12) =11787602a(13) =53536730a(14) =249807454a(15) =1148715115a(16) =5408943850a(17) =25167049884a(18) =119194478064a(19) =558795070017
External references
- oeis: A150370