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, 0), (-1, 0, 1), (-1, 1, 0), (1, 0, 0)}.
A148509
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, 0), (-1, 0, 1), (-1, 1, 0), (1, 0, 0)}.
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =17a(5) =34a(6) =131a(7) =293a(8) =1165a(9) =2762a(10) =11375a(11) =28192a(12) =119093a(13) =304914a(14) =1305300a(15) =3420907a(16) =14869109a(17) =39750810a(18) =174464451a(19) =473667396a(20) =2096008385a(21) =5764418172a(22) =25703266886a(23) =71476636250a(24) =320474014833a(25) =899436626699
External references
- oeis: A148509