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, 1), (1, 0, 0)}.
A148054
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, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =10a(5) =20a(6) =68a(7) =147a(8) =530a(9) =1224a(10) =4408a(11) =10516a(12) =39378a(13) =97474a(14) =365038a(15) =920535a(16) =3501858a(17) =9009592a(18) =34248844a(19) =89167304a(20) =343038006a(21) =905754654a(22) =3484015834a(23) =9277353140a(24) =35924495108a(25) =96578927300a(26) =373891285428
External references
- oeis: A148054