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, 0, 1), (-1, 1, -1), (1, -1, -1), (1, 0, 1)}.
A148545
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, 0, 1), (-1, 1, -1), (1, -1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =19a(5) =45a(6) =173a(7) =469a(8) =1915a(9) =5659a(10) =23407a(11) =73243a(12) =310175a(13) =1013731a(14) =4337131a(15) =14639923a(16) =63383137a(17) =219607045a(18) =958081677a(19) =3390264805a(20) =14897264533a(21) =53646021617a(22) =237065064241a(23) =866461879503
External references
- oeis: A148545