80475
domain: N
Appears in sequences
- Number of base 25 circular n-digit numbers with adjacent digits differing by 4 or less.at n=5A125362
- Negative value of coefficient of x^(n-2) in the characteristic polynomial of a certain n X n integer circulant matrix.at n=28A127407
- "Self-Lucas"; a(n) is the sum of the last 5 terms. Sequence starts with 12,21,3,1,19 which are l,u,c,a,s if you consider a=1, b=2, c=3, ..., z=26.at n=16A129939
- Numbers k such that k and k+1 both have the prime signature (2,1,1,1) (A189982).at n=25A336658
- a(n) = A351477(n) * FC where F is the Fermat point of a primitive integer-sided triangle ABC with A < B < C < 2*Pi/3 and FA + FB + FC = A336329(n).at n=16A351803