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, 0), (0, 0, 1), (1, -1, 0), (1, 1, 0)}.
A150229
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, 0), (0, 0, 1), (1, -1, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =22a(4) =80a(5) =310a(6) =1252a(7) =5148a(8) =21482a(9) =91276a(10) =392896a(11) =1701500a(12) =7442013a(13) =32815590a(14) =145380566a(15) =647569948a(16) =2900243037a(17) =13040713888a(18) =58828778368a(19) =266395866595
External references
- oeis: A150229