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), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
A150970
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), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =36a(4) =157a(5) =710a(6) =3257a(7) =15115a(8) =71008a(9) =336214a(10) =1599507a(11) =7650782a(12) =36747858a(13) =177037977a(14) =855315890a(15) =4142700612a(16) =20105493813a(17) =97750570368a(18) =476036133721
External references
- oeis: A150970