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), (-1, 1, 0), (0, 1, 1), (1, 0, -1)}.
A148441
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), (-1, 1, 0), (0, 1, 1), (1, 0, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =16a(5) =45a(6) =154a(7) =499a(8) =1634a(9) =5888a(10) =20756a(11) =73719a(12) =274261a(13) =1014619a(14) =3778927a(15) =14390276a(16) =54958618a(17) =210937648a(18) =818267680a(19) =3195429278a(20) =12519044949a(21) =49315252155a(22) =195701199479a(23) =778376463382
External references
- oeis: A148441