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, 1, -1)}.
A150650
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, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =28a(4) =118a(5) =517a(6) =2324a(7) =10621a(8) =49203a(9) =230146a(10) =1085409a(11) =5149462a(12) =24559846a(13) =117620800a(14) =565339017a(15) =2725491522a(16) =13174056237a(17) =63823083626a(18) =309812004803
External references
- oeis: A150650