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, 0, 1), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.
A148865
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, 0, 1), (0, 1, -1), (1, -1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =28a(5) =96a(6) =363a(7) =1322a(8) =5361a(9) =20650a(10) =85822a(11) =346922a(12) =1468980a(13) =6087326a(14) =26262665a(15) =110856469a(16) =484244554a(17) =2079234507a(18) =9165138514a(19) =39846024767a(20) =177114782991a(21) =777413068286
External references
- oeis: A148865