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), (-1, 0, -1), (0, -1, -1), (1, 1, 0)}.
A148526
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), (-1, 0, -1), (0, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =19a(5) =39a(6) =155a(7) =369a(8) =1471a(9) =3959a(10) =15299a(11) =45891a(12) =170211a(13) =558079a(14) =1999887a(15) =7013101a(16) =24643131a(17) =90232963a(18) =316320955a(19) =1182714675a(20) =4196267767a(21) =15761054363a(22) =57083907867a(23) =213546145183a(24) =790981954707
External references
- oeis: A148526