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), (0, 0, -1), (1, -1, 1), (1, 0, 0)}.
A148245
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), (0, 0, -1), (1, -1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =36a(6) =118a(7) =385a(8) =1347a(9) =4793a(10) =17541a(11) =65636a(12) =250216a(13) =967021a(14) =3797305a(15) =15065117a(16) =60472135a(17) =244972973a(18) =1000682072a(19) =4120934958a(20) =17084483793a(21) =71285735974a(22) =299214894796
External references
- oeis: A148245