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, 1), (-1, 0, 1), (1, 0, 0), (1, 1, 0)}.
A150313
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, 1), (-1, 0, 1), (1, 0, 0), (1, 1, 0)}.
Terms
- a(0) =1a(1) =2a(2) =7a(3) =21a(4) =86a(5) =308a(6) =1334a(7) =5105a(8) =22767a(9) =91337a(10) =414498a(11) =1709124a(12) =7849083a(13) =33074337a(14) =153116559a(15) =654915363a(16) =3051009294a(17) =13214018558a(18) =61839195598a(19) =270363305206
External references
- oeis: A150313