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, -1), (1, -1, 0), (1, 1, -1), (1, 1, 0)}.
A148638
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, -1), (1, -1, 0), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =22a(5) =61a(6) =233a(7) =733a(8) =2947a(9) =10104a(10) =41604a(11) =150819a(12) =634383a(13) =2395210a(14) =10223510a(15) =39801121a(16) =171943819a(17) =685615395a(18) =2990420051a(19) =12155736895a(20) =53444047859a(21) =220699421489a(22) =976862543867
External references
- oeis: A148638