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, 0), (-1, 0, -1), (0, -1, -1), (0, 1, 1), (1, 1, 1)}.
A150676
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, 0), (-1, 0, -1), (0, -1, -1), (0, 1, 1), (1, 1, 1)}.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =26a(4) =112a(5) =426a(6) =1866a(7) =7680a(8) =33800a(9) =145584a(10) =644204a(11) =2849608a(12) =12708082a(13) =57072764a(14) =256787282a(15) =1163494774a(16) =5279181198a(17) =24062021656a(18) =109946406784a(19) =503537243732
External references
- oeis: A150676