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, -1), (-1, -1, 1), (-1, 1, -1), (0, 1, 1), (1, -1, -1)}.
A148063
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, -1), (-1, -1, 1), (-1, 1, -1), (0, 1, 1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =12a(5) =25a(6) =77a(7) =181a(8) =716a(9) =1829a(10) =6571a(11) =18269a(12) =70996a(13) =201473a(14) =781810a(15) =2337483a(16) =9127008a(17) =27781965a(18) =110943651a(19) =346119897a(20) =1377659748a(21) =4386994929a(22) =17681473032a(23) =57009873027a(24) =230888035146a(25) =756580283257
External references
- oeis: A148063