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), (0, 0, -1), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.
A149835
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), (0, 0, -1), (0, 1, 0), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =30a(5) =96a(6) =324a(7) =1138a(8) =4134a(9) =15464a(10) =59198a(11) =230678a(12) =913916a(13) =3672582a(14) =14940794a(15) =61426632a(16) =254982076a(17) =1067415522a(18) =4502824810a(19) =19124778850a(20) =81738521776a(21) =351324672662
External references
- oeis: A149835