6871947673
domain: N
Appears in sequences
- Expansion of (1-x)/(1-2*x+x^2-2*x^3).at n=34A007909
- Base 4 digits are, in order, the first n terms of the periodic sequence with initial period 1,2.at n=17A037481
- Largest prime substring in 2^n (or 0 if none exist).at n=36A046268
- Largest prime substring in 4^n (0 if none).at n=18A046270
- Largest prime substring in 8^n (0 if none).at n=12A046274
- Expansion of 1/((1-x)*(1-2*x)*(1+x^2)).at n=32A077854
- Largest prime factor of 2^n-3.at n=33A093817
- A006530(x)=2 is a local minimum if x=2^n. Running downward with argument x started at 2^n, the largest prime divisor should increase. The value of first peak is a(n).at n=34A102644
- a(n) = 3*a(n-1) + 4*a(n-2), a(0)=a(1)=1.at n=17A102900
- List of numbers of the forms (2^(4m+3)-3)/5 and (2^(12m+4)-3)/13 arranged in increasing order.at n=11A260953
- Primes of the form floor(2^k / 5).at n=4A384697