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, 0), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
A148882
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, 0), (0, 1, -1), (0, 1, 1), (1, -1, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =8a(4) =30a(5) =97a(6) =377a(7) =1371a(8) =5629a(9) =21821a(10) =91723a(11) =370448a(12) =1590614a(13) =6610572a(14) =28808574a(15) =122283013a(16) =539341238a(17) =2326254276a(18) =10357685562a(19) =45242780800a(20) =203008539599a(21) =895866873466
External references
- oeis: A148882