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), (0, 1, -1), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
A150632
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), (0, 1, -1), (1, 0, 0), (1, 1, -1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =27a(4) =115a(5) =504a(6) =2265a(7) =10338a(8) =47813a(9) =223114a(10) =1050079a(11) =4971631a(12) =23668103a(13) =113156814a(14) =543034247a(15) =2614185185a(16) =12619036497a(17) =61058203462a(18) =296045810619
External references
- oeis: A150632