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, 0, 1), (0, -1, 1), (0, 0, 1), (0, 1, 0), (1, 1, -1)}.
A150213
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, 0, 1), (0, -1, 1), (0, 0, 1), (0, 1, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =21a(4) =81a(5) =331a(6) =1408a(7) =6158a(8) =27500a(9) =124785a(10) =573374a(11) =2661181a(12) =12452537a(13) =58663693a(14) =277925301a(15) =1322985057a(16) =6323345510a(17) =30329047324a(18) =145911596929a(19) =703840378250
External references
- oeis: A150213