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, 0), (-1, 1, -1), (-1, 1, 0), (0, 1, 1), (1, -1, 0)}.
A148369
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, 0), (-1, 1, -1), (-1, 1, 0), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =42a(6) =147a(7) =454a(8) =1628a(9) =5425a(10) =20178a(11) =70153a(12) =268235a(13) =962420a(14) =3748820a(15) =13809050a(16) =54492862a(17) =204977746a(18) =817599476a(19) =3126108027a(20) =12586411942a(21) =48758462507a(22) =197878414706a(23) =775091653268
External references
- oeis: A148369