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, 0), (-1, 0, -1), (-1, 1, 1), (1, -1, -1), (1, 0, 0)}.
A148264
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, 0), (-1, 0, -1), (-1, 1, 1), (1, -1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =14a(5) =33a(6) =121a(7) =331a(8) =1260a(9) =3732a(10) =14752a(11) =45885a(12) =186399a(13) =602858a(14) =2490029a(15) =8314987a(16) =34769521a(17) =119019641a(18) =503160913a(19) =1756550796a(20) =7494798004a(21) =26603018599a(22) =114346230439a(23) =411745418913
External references
- oeis: A148264