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), (0, 1, -1), (1, 0, -1), (1, 0, 0)}.
A148302
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), (0, 1, -1), (1, 0, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =38a(6) =113a(7) =365a(8) =1191a(9) =4067a(10) =14144a(11) =50226a(12) =182525a(13) =669319a(14) =2506400a(15) =9447969a(16) =36149151a(17) =139432800a(18) =542694872a(19) =2132023358a(20) =8422627133a(21) =33567994566a(22) =134391139541a(23) =541815720672
External references
- oeis: A148302