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), (0, 1, -1), (1, -1, -1), (1, 1, 0)}.
A148833
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), (0, 1, -1), (1, -1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =27a(5) =88a(6) =330a(7) =1233a(8) =4757a(9) =19087a(10) =77084a(11) =318057a(12) =1332943a(13) =5633800a(14) =24135510a(15) =104270601a(16) =453822577a(17) =1992313735a(18) =8796237670a(19) =39076873799a(20) =174584332753a(21) =783445597358
External references
- oeis: A148833