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), (-1, 1, 1), (0, 0, 1), (1, 0, -1)}.
A148315
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), (-1, 1, 1), (0, 0, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =14a(5) =38a(6) =124a(7) =376a(8) =1294a(9) =4282a(10) =15297a(11) =53096a(12) =196380a(13) =703207a(14) =2666168a(15) =9803953a(16) =37810371a(17) =142047071a(18) =555546878a(19) =2121629955a(20) =8397566784a(21) =32502960555a(22) =129911998351a(23) =508624323397
External references
- oeis: A148315