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, 0, 1), (-1, 1, 1), (0, -1, 1), (1, 0, 1), (1, 1, -1)}.
A149485
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, 0, 1), (-1, 1, 1), (0, -1, 1), (1, 0, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =58a(5) =236a(6) =1061a(7) =4706a(8) =21650a(9) =99606a(10) =466518a(11) =2190098a(12) =10383439a(13) =49367094a(14) =236113304a(15) =1132153966a(16) =5450278252a(17) =26293717423a(18) =127207867136a(19) =616512989395
External references
- oeis: A149485