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, 1, 1), (1, 0, -1), (1, 1, 0)}.
A148714
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, 1, 1), (1, 0, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =7a(4) =24a(5) =67a(6) =247a(7) =762a(8) =2895a(9) =9497a(10) =36627a(11) =124992a(12) =486807a(13) =1707285a(14) =6693429a(15) =23951625a(16) =94333590a(17) =342762753a(18) =1354438586a(19) =4980627013a(20) =19729351523a(21) =73247980483a(22) =290692026962
External references
- oeis: A148714