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, 0), (1, -1, 0), (1, 0, 0), (1, 1, -1)}.
A148741
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, 0), (1, -1, 0), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =26a(5) =80a(6) =324a(7) =1150a(8) =4908a(9) =18964a(10) =83715a(11) =341998a(12) =1545368a(13) =6563356a(14) =30163671a(15) =131790446a(16) =613435908a(17) =2738122567a(18) =12871074729a(19) =58410682449a(20) =276719975340
External references
- oeis: A148741