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, 0, 0), (0, -1, 0), (1, 1, 0), (1, 1, 1)}.
A150714
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, 0, 0), (0, -1, 0), (1, 1, 0), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =28a(4) =104a(5) =400a(6) =1536a(7) =5936a(8) =23264a(9) =91072a(10) =357632a(11) =1412480a(12) =5577984a(13) =22061568a(14) =87511040a(15) =347153152a(16) =1378358784a(17) =5481688064a(18) =21803069440a(19) =86767978496a(20) =345644969984
External references
- oeis: A150714