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, 1), (0, -1, 0), (1, 0, 0)}.
A148241
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, 1), (0, -1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =36a(6) =115a(7) =342a(8) =1111a(9) =3680a(10) =12694a(11) =43717a(12) =151841a(13) =531019a(14) =1897850a(15) =6869326a(16) =25048195a(17) =91509321a(18) =335718945a(19) =1242422665a(20) =4640015815a(21) =17420486353a(22) =65559887687a(23) =247227816277a(24) =936479964272
External references
- oeis: A148241