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, 1, -1), (0, 1, -1), (0, 1, 1), (1, 0, 0)}.
A150007
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, 1, -1), (0, 1, -1), (0, 1, 1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =17a(4) =60a(5) =221a(6) =842a(7) =3296a(8) =13055a(9) =52736a(10) =215995a(11) =892130a(12) =3721084a(13) =15641114a(14) =66149907a(15) =281448936a(16) =1204203656a(17) =5175356782a(18) =22336615979a(19) =96782596868a(20) =420774787816
External references
- oeis: A150007