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, 0, -1), (1, 0, 0)}.
A148303
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, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =38a(6) =119a(7) =392a(8) =1322a(9) =4723a(10) =17050a(11) =63318a(12) =241270a(13) =927321a(14) =3646707a(15) =14487316a(16) =58273122a(17) =237345018a(18) =974596819a(19) =4042834966a(20) =16899686492a(21) =71177203798a(22) =301888303055
External references
- oeis: A148303