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, 0, 0), (1, 0, -1), (1, 1, 0)}.
A148604
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, 0, 0), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =21a(5) =53a(6) =197a(7) =568a(8) =2214a(9) =6804a(10) =27244a(11) =88922a(12) =363478a(13) =1223437a(14) =5079662a(15) =17701507a(16) =74338976a(17) =263864680a(18) =1119619158a(19) =4065560701a(20) =17376239881a(21) =63877505947a(22) =275032486480
External references
- oeis: A148604