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, -1), (-1, -1, 1), (-1, 1, 0), (0, 1, 0), (1, 0, 0)}.
A149914
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, -1), (-1, -1, 1), (-1, 1, 0), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =15a(4) =47a(5) =150a(6) =511a(7) =1818a(8) =6553a(9) =24152a(10) =91011a(11) =345464a(12) =1323971a(13) =5153325a(14) =20242463a(15) =79980418a(16) =318692165a(17) =1278021945a(18) =5144043475a(19) =20816623561a(20) =84730346521a(21) =346195467540
External references
- oeis: A149914