51667
domain: N
Appears in sequences
- Base 3 digits are, in order, the first n terms of the periodic sequence with initial period 2,1.at n=9A037488
- Numbers that are repdigits in base 9.at n=39A048334
- Expansion of g.f. (1+4*x)/((1-x)*(1+x)*(1-3*x)).at n=9A085287
- Partial sums of economical numbers A046759.at n=32A172460
- Non-Brauer numbers.at n=42A349044