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, 1), (-1, 1, 1), (0, 0, 1), (1, 0, -1), (1, 1, -1)}.
A149015
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, 1), (-1, 1, 1), (0, 0, 1), (1, 0, -1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =35a(5) =117a(6) =503a(7) =1873a(8) =8347a(9) =33437a(10) =152079a(11) =638281a(12) =2947971a(13) =12769365a(14) =59679863a(15) =264508929a(16) =1247512235a(17) =5626888973a(18) =26726464607a(19) =122222614073a(20) =583810033107
External references
- oeis: A149015