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, 0, 1), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
A150281
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, 0, 1), (0, 1, -1), (0, 1, 0), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =23a(4) =90a(5) =364a(6) =1529a(7) =6515a(8) =28269a(9) =124083a(10) =548636a(11) =2446445a(12) =10974175a(13) =49474634a(14) =224086323a(15) =1018607577a(16) =4645729659a(17) =21251933083a(18) =97463569132a(19) =448029732061
External references
- oeis: A150281