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, 0, 1), (0, -1, 1), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.
A150182
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, 0, 1), (0, -1, 1), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =78a(5) =316a(6) =1356a(7) =5954a(8) =26866a(9) =123102a(10) =572542a(11) =2690656a(12) =12760224a(13) =60945894a(14) =292847054a(15) =1414148872a(16) =6857590976a(17) =33372997268a(18) =162906627036a(19) =797295705256
External references
- oeis: A150182