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, 0, 0), (0, -1, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
A149480
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, 0, 0), (0, -1, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =13a(4) =57a(5) =232a(6) =1026a(7) =4535a(8) =20630a(9) =94513a(10) =439245a(11) =2054404a(12) =9687415a(13) =45916162a(14) =218754129a(15) =1046294862a(16) =5022478726a(17) =24180846137a(18) =116731776457a(19) =564812432954
External references
- oeis: A149480