1161737179
domain: N
Appears in sequences
- a(n) = 3^n - 2^n.at n=19A001047
- Nexus numbers (n+1)^19 - n^19.at n=2A022535
- G.f.: (2-x)/((1+2x)(1-3x)); e.g.f.: exp(3x)+exp(-2x); a(n)=3^n+(-2)^n.at n=19A087451
- Semiprimes of the form 3^n - 2^n.at n=4A095027
- Zsigmondy numbers for a = 3, b = 2: Zs(n, 3, 2) is the greatest divisor of 3^n - 2^n (A001047) that is relatively prime to 3^m - 2^m for all positive integers m < n.at n=18A109325
- 3^p - 2^p, where p = prime(n).at n=7A135171
- Number of second differences of arrays of length n + 2 of numbers in 0..2.at n=16A228212
- Number of third differences of arrays of length n+3 of numbers in 0..2.at n=15A228254
- Number of achiral color patterns (set partitions) for a row or loop of length n using exactly 3 colors (sets).at n=39A304973
- a(n) are the denominators corresponding to A370823(n).at n=18A370824