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), (-1, 1, 1), (1, 0, 0)}.
A148068
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), (-1, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =12a(5) =25a(6) =87a(7) =189a(8) =844a(9) =2061a(10) =8265a(11) =20317a(12) =94014a(13) =246389a(14) =1051736a(15) =2752635a(16) =12971752a(17) =35409589a(18) =156545721a(19) =425681757a(20) =2028643354a(21) =5687451021a(22) =25714495202a(23) =71753924987a(24) =344569097136a(25) =984453928825
External references
- oeis: A148068