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), (0, 1, -1), (1, 0, 0)}.
A148038
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), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =8a(5) =19a(6) =53a(7) =150a(8) =435a(9) =1373a(10) =4234a(11) =13803a(12) =45615a(13) =152565a(14) =525436a(15) =1807917a(16) =6370454a(17) =22648924a(18) =81045274a(19) =294605006a(20) =1074167523a(21) =3960848064a(22) =14708826191a(23) =54866285401a(24) =206578823690a(25) =780529431496
External references
- oeis: A148038