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, 0, -1), (1, 0, -1), (1, 1, 1)}.
A149535
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, 0, -1), (1, 0, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =13a(4) =49a(5) =177a(6) =667a(7) =2511a(8) =10009a(9) =39187a(10) =156459a(11) =634903a(12) =2578455a(13) =10525071a(14) =43487445a(15) =179765607a(16) =746023615a(17) =3116227327a(18) =13044713059a(19) =54722046417a(20) =230545171841a(21) =973437088031
External references
- oeis: A149535