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, 0, 0), (-1, 1, 1), (0, -1, 0), (0, 1, -1), (1, 1, 1)}.
A149765
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, 0, 0), (-1, 1, 1), (0, -1, 0), (0, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =19a(4) =73a(5) =299a(6) =1267a(7) =5449a(8) =23695a(9) =103995a(10) =460999a(11) =2057741a(12) =9236055a(13) =41657127a(14) =188679191a(15) =857797317a(16) =3912417293a(17) =17895491719a(18) =82064705529a(19) =377194431957
External references
- oeis: A149765