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, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1)}.
A148147
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, 0, 1), (0, 0, 1), (0, 1, -1), (1, -1, 1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =11a(5) =29a(6) =94a(7) =286a(8) =979a(9) =3248a(10) =11681a(11) =40909a(12) =152740a(13) =556090a(14) =2129094a(15) =7997403a(16) =31212056a(17) =119998066a(18) =476046850a(19) =1863806284a(20) =7493408222a(21) =29788758672a(22) =121056229310a(23) =487416498090
External references
- oeis: A148147