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), (-1, 1, -1), (0, 1, 1), (1, 0, -1)}.
A148341
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), (-1, 1, -1), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =38a(6) =126a(7) =403a(8) =1279a(9) =4376a(10) =15361a(11) =52102a(12) =188609a(13) =682100a(14) =2452663a(15) =9092749a(16) =33897678a(17) =125807483a(18) =476687741a(19) =1812253948a(20) =6890616924a(21) =26495876430a(22) =102414244638a(23) =396017819775
External references
- oeis: A148341