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), (-1, 1, 0), (1, 0, 0), (1, 1, -1)}.
A148643
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), (-1, 1, 0), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =23a(5) =59a(6) =242a(7) =710a(8) =3065a(9) =9745a(10) =43180a(11) =145334a(12) =657471a(13) =2303819a(14) =10560958a(15) =38192920a(16) =177000421a(17) =655911820a(18) =3063612225a(19) =11584103157a(20) =54465884875a(21) =209362835421a(22) =989410879714
External references
- oeis: A148643