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, 1, -1), (0, 0, 1), (1, -1, 1), (1, 1, -1)}.
A148381
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, 1, -1), (0, 0, 1), (1, -1, 1), (1, 1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =16a(5) =48a(6) =175a(7) =619a(8) =2380a(9) =9171a(10) =36721a(11) =148656a(12) =615159a(13) =2571205a(14) =10910476a(15) =46683700a(16) =201929895a(17) =879826156a(18) =3863795243a(19) =17077106109a(20) =75933757691a(21) =339480057377
External references
- oeis: A148381