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, 1), (-1, 0, 1), (0, 1, 0), (1, 1, -1), (1, 1, 1)}.
A150641
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, 1), (-1, 0, 1), (0, 1, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =117a(5) =514a(6) =2327a(7) =10642a(8) =49357a(9) =230744a(10) =1087567a(11) =5155525a(12) =24567985a(13) =117557404a(14) =564554431a(15) =2719378931a(16) =13133588981a(17) =63574966648a(18) =308364056247
External references
- oeis: A150641