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, 0, -1), (0, 1, 0), (1, -1, 0)}.
A148193
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, 0, -1), (0, 1, 0), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =32a(6) =96a(7) =297a(8) =992a(9) =3292a(10) =11286a(11) =39642a(12) =142702a(13) =517764a(14) =1905053a(15) =7112962a(16) =26884881a(17) =102419779a(18) =393417205a(19) =1524886160a(20) =5956755229a(21) =23413733787a(22) =92563423743a(23) =368132782768
External references
- oeis: A148193