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, -1), (1, 1, 0)}.
A149373
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, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =12a(4) =46a(5) =174a(6) =703a(7) =2888a(8) =12148a(9) =51924a(10) =224551a(11) =982451a(12) =4331352a(13) =19247666a(14) =86027816a(15) =386632310a(16) =1745493623a(17) =7912474214a(18) =35995573003a(19) =164273095721a(20) =751821506551
External references
- oeis: A149373