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, 1), (0, 1, 0), (1, 0, 0)}.
A149810
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, 1), (0, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =26a(5) =66a(6) =194a(7) =590a(8) =1742a(9) =5490a(10) =17402a(11) =53538a(12) =175010a(13) =578366a(14) =1865414a(15) =6257594a(16) =21029690a(17) =68978514a(18) =235163458a(19) =805792730a(20) =2705063098a(21) =9347746654a(22) =32323281142a(23) =109506506322a(24) =381914855922
External references
- oeis: A149810