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, 1, -1), (0, 1, 1), (1, 0, 0)}.
A149842
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, 1, -1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =12a(4) =36a(5) =110a(6) =362a(7) =1184a(8) =3970a(9) =13460a(10) =46182a(11) =160424a(12) =558504a(13) =1966559a(14) =6952260a(15) =24667781a(16) =88039932a(17) =315257113a(18) =1132887337a(19) =4082861443a(20) =14761825714a(21) =53495073036a(22) =194274233075a(23) =707197292768
External references
- oeis: A149842