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), (0, -1, 1), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
A150642
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), (0, -1, 1), (0, 1, 0), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =117a(5) =520a(6) =2396a(7) =11199a(8) =53136a(9) =254408a(10) =1227523a(11) =5956859a(12) =29040155a(13) =142098258a(14) =697385628a(15) =3431103163a(16) =16915366120a(17) =83536683684a(18) =413145595520
External references
- oeis: A150642