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), (1, 0, 1), (1, 1, -1), (1, 1, 0)}.
A150823
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), (1, 0, 1), (1, 1, -1), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =31a(4) =142a(5) =619a(6) =2957a(7) =13586a(8) =66103a(9) =312109a(10) =1533335a(11) =7356615a(12) =36345414a(13) =176170741a(14) =873416735a(15) =4263012621a(16) =21183369791a(17) =103901834281a(18) =517100764504
External references
- oeis: A150823