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), (0, 1, 1), (1, -1, 0), (1, 0, -1)}.
A148944
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), (0, 1, 1), (1, -1, 0), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =9a(4) =29a(5) =103a(6) =393a(7) =1523a(8) =5985a(9) =24617a(10) =102357a(11) =430363a(12) =1838761a(13) =7931043a(14) =34615153a(15) =152208659a(16) =673421637a(17) =3003153451a(18) =13464915837a(19) =60712552141a(20) =275067241835
External references
- oeis: A148944