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, 0), (0, -1, 0), (0, 0, -1), (0, 1, 1), (1, 0, 1)}.
A150761
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, 0), (0, -1, 0), (0, 0, -1), (0, 1, 1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =30a(4) =122a(5) =522a(6) =2256a(7) =9962a(8) =44796a(9) =202794a(10) =927606a(11) =4280380a(12) =19845134a(13) =92551574a(14) =433896100a(15) =2040965858a(16) =9637093830a(17) =45662395760a(18) =216890822656
External references
- oeis: A150761