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), (1, 0, 1), (1, 1, 1)}.
A150972
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), (1, 0, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =9a(3) =36a(4) =159a(5) =719a(6) =3324a(7) =15454a(8) =72896a(9) =345861a(10) =1649363a(11) =7902249a(12) =38014529a(13) =183362565a(14) =886800001a(15) =4298873305a(16) =20878467212a(17) =101568952226a(18) =494874891454
External references
- oeis: A150972