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, 0, 0), (0, 0, 1), (1, -1, 1), (1, 0, 0), (1, 1, -1)}.
A150157
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, 0, 0), (0, 0, 1), (1, -1, 1), (1, 0, 0), (1, 1, -1)}.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =20a(4) =74a(5) =292a(6) =1202a(7) =5106a(8) =22185a(9) =98124a(10) =440191a(11) =1997709a(12) =9153957a(13) =42286652a(14) =196697066a(15) =920385559a(16) =4328900377a(17) =20452147695a(18) =97010623252a(19) =461766013148
External references
- oeis: A150157