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, 1, 1), (1, -1, 1), (1, 1, 0)}.
A148744
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, 1, 1), (1, -1, 1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =27a(5) =77a(6) =297a(7) =917a(8) =3593a(9) =11749a(10) =46525a(11) =157655a(12) =625219a(13) =2167731a(14) =8620179a(15) =30456591a(16) =121380243a(17) =434976675a(18) =1734480173a(19) =6282797093a(20) =25073198147a(21) =91667720051a(22) =366087089389
External references
- oeis: A148744