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, 0, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
A150639
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, 0, 1), (0, 1, 1), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =116a(5) =514a(6) =2353a(7) =10965a(8) =51848a(9) =247599a(10) =1191914a(11) =5772364a(12) =28090825a(13) =137232251a(14) =672550545a(15) =3304646991a(16) =16273110989a(17) =80280588915a(18) =396665046450
External references
- oeis: A150639