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, 1), (0, 1, 0), (1, 0, -1), (1, 0, 0)}.
A150100
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, 1), (0, 1, 0), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =19a(4) =68a(5) =251a(6) =983a(7) =3924a(8) =16210a(9) =67836a(10) =290213a(11) =1253258a(12) =5495220a(13) =24266747a(14) =108356043a(15) =486533258a(16) =2202981039a(17) =10019758277a(18) =45870934468a(19) =210776167079a(20) =973568507191
External references
- oeis: A150100