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, 0), (-1, 0, 1), (-1, 1, 0), (0, 1, -1), (1, 0, 0)}.
A148588
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, 0), (-1, 0, 1), (-1, 1, 0), (0, 1, -1), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =6a(4) =20a(5) =55a(6) =184a(7) =591a(8) =2022a(9) =7046a(10) =24888a(11) =90207a(12) =328888a(13) =1221276a(14) =4569389a(15) =17273315a(16) =65853981a(17) =252762675a(18) =977445345a(19) =3800281869a(20) =14860432632a(21) =58393802535a(22) =230495750196a(23) =913747733984
External references
- oeis: A148588