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, 0), (-1, 0, -1), (0, 0, 1), (1, -1, 1), (1, 1, -1)}.
A148377
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, 0), (-1, 0, -1), (0, 0, 1), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =46a(6) =159a(7) =536a(8) =1934a(9) =7003a(10) =26466a(11) =99651a(12) =386911a(13) =1511570a(14) =5975390a(15) =23858941a(16) =96321883a(17) =390396528a(18) =1598094790a(19) =6580849011a(20) =27219861639a(21) =113308413777a(22) =474111950971
External references
- oeis: A148377