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), (0, 0, -1), (1, 0, 1)}.
A148679
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), (0, 0, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =21a(5) =73a(6) =229a(7) =777a(8) =2687a(9) =9531a(10) =35431a(11) =128883a(12) =478235a(13) =1784839a(14) =6775523a(15) =26085247a(16) =100114965a(17) =388112537a(18) =1505030269a(19) =5897848369a(20) =23250175625a(21) =91758487101a(22) =364379639057
External references
- oeis: A148679