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), (0, 1, 0), (1, -1, -1), (1, 0, 1)}.
A150011
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), (0, 1, 0), (1, -1, -1), (1, 0, 1)}.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =17a(4) =60a(5) =226a(6) =894a(7) =3596a(8) =14733a(9) =61458a(10) =259481a(11) =1106753a(12) =4764856a(13) =20677287a(14) =90314950a(15) =396783369a(16) =1752566181a(17) =7776050081a(18) =34641886875a(19) =154916582579a(20) =695094294939
External references
- oeis: A150011