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, 1), (0, 0, -1), (0, 1, -1), (1, 0, 1)}.
A148693
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, 1), (0, 0, -1), (0, 1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =23a(5) =67a(6) =237a(7) =805a(8) =2885a(9) =10445a(10) =39679a(11) =148885a(12) =573215a(13) =2242027a(14) =8857871a(15) =35069977a(16) =141098599a(17) =572026433a(18) =2327192345a(19) =9529746879a(20) =39375349267a(21) =163259808875a(22) =679323714809
External references
- oeis: A148693