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), (0, 1, 1), (1, -1, -1), (1, 0, -1)}.
A148869
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), (0, 1, 1), (1, -1, -1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =29a(5) =93a(6) =358a(7) =1331a(8) =5232a(9) =20772a(10) =84819a(11) =348269a(12) =1459026a(13) =6155455a(14) =26254063a(15) =112869377a(16) =488935002a(17) =2130797874a(18) =9344281029a(19) =41178638659a(20) =182340725116a(21) =810836851530
External references
- oeis: A148869