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), (-1, 1, -1), (1, 0, 0), (1, 1, -1)}.
A148228
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), (-1, 1, -1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =32a(6) =112a(7) =317a(8) =1199a(9) =3650a(10) =14390a(11) =46288a(12) =187934a(13) =628364a(14) =2608187a(15) =8985156a(16) =37900208a(17) =133703155a(18) =571404787a(19) =2054685733a(20) =8871770591a(21) =32416109883a(22) =141169696693a(23) =522777139834
External references
- oeis: A148228