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, -1, 0), (-1, -1, 1), (0, 1, 0), (1, 0, 0)}.
A149838
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, -1, 0), (-1, -1, 1), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =12a(4) =36a(5) =100a(6) =340a(7) =1154a(8) =3650a(9) =13244a(10) =47744a(11) =161458a(12) =608218a(13) =2273268a(14) =8015248a(15) =30948100a(16) =118491620a(17) =429836776a(18) =1688856912a(19) =6578861670a(20) =24365169758a(21) =96986976404a(22) =382761606472
External references
- oeis: A149838