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), (-1, 0, 1), (0, 1, 1), (1, 0, -1)}.
A148368
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), (-1, 0, 1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =42a(6) =147a(7) =454a(8) =1616a(9) =5413a(10) =20074a(11) =69620a(12) =266488a(13) =954572a(14) =3708394a(15) =13683016a(16) =53792464a(17) =202506642a(18) =806262279a(19) =3080435321a(20) =12385576657a(21) =47967293239a(22) =194245323577a(23) =761125371583
External references
- oeis: A148368