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), (-1, 1, -1), (0, 1, 1), (1, -1, -1)}.
A148062
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), (-1, 1, -1), (0, 1, 1), (1, -1, -1)}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =12a(5) =25a(6) =77a(7) =181a(8) =696a(9) =1809a(10) =5991a(11) =17609a(12) =63958a(13) =188683a(14) =653258a(15) =2112627a(16) =7535840a(17) =23721089a(18) =85713509a(19) =286499693a(20) =1026150382a(21) =3374608955a(22) =12502467560a(23) =42456829669a(24) =153777339420a(25) =523923695731
External references
- oeis: A148062