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, 0, 0), (0, -1, 0), (0, 1, -1), (1, 0, 0), (1, 1, 1)}.
A150841
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, 0, 0), (0, -1, 0), (0, 1, -1), (1, 0, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =32a(4) =138a(5) =612a(6) =2764a(7) =12700a(8) =58968a(9) =276528a(10) =1305745a(11) =6201839a(12) =29599678a(13) =141827398a(14) =681967982a(15) =3288696968a(16) =15900565194a(17) =77048864705a(18) =374090158891
External references
- oeis: A150841