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), (1, -1, -1), (1, -1, 1), (1, 1, 1)}.
A149516
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), (1, -1, -1), (1, -1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =11a(4) =49a(5) =157a(6) =629a(7) =2319a(8) =9309a(9) =36067a(10) =146735a(11) =583717a(12) =2403149a(13) =9754979a(14) =40462171a(15) =166354683a(16) =695612827a(17) =2888616957a(18) =12146055243a(19) =50820925053a(20) =214800425487a(21) =904468489247
External references
- oeis: A149516