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), (0, 0, 1), (0, 1, 0), (1, -1, -1)}.
A149817
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), (0, 0, 1), (0, 1, 0), (1, -1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =26a(5) =76a(6) =248a(7) =810a(8) =2710a(9) =9279a(10) =32769a(11) =118679a(12) =434731a(13) =1605567a(14) =6001035a(15) =22816644a(16) =87542063a(17) =337991886a(18) =1312648077a(19) =5140546851a(20) =20310742444a(21) =80662660780a(22) =321579922685
External references
- oeis: A149817