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, 0, 1), (-1, 1, -1), (-1, 1, 1), (1, 0, 0)}.
A148552
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, 0, 1), (-1, 1, -1), (-1, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =21a(5) =44a(6) =194a(7) =447a(8) =2059a(9) =5054a(10) =23760a(11) =60785a(12) =290185a(13) =765374a(14) =3688939a(15) =9954865a(16) =48328461a(17) =132793952a(18) =648110850a(19) =1806922951a(20) =8854881499a(21) =24984984772a(22) =122828350857a(23) =350072375310
External references
- oeis: A148552