21492
domain: N
Appears in sequences
- Coordination sequence for MgCu2, Cu position.at n=36A009930
- An upper bound for linearized chord diagrams.at n=9A022490
- Sum of the next n members of the list of twin primes.at n=13A038345
- a(n) = -a(n-1) - a(n-2) + a(n-3), a(0)=0, a(1)=0, a(2)=1.at n=40A057597
- Numbers that have exactly six prime factors counted with multiplicity (A046306) whose digit reversal is different and also has 6 prime factors (with multiplicity).at n=30A109026
- Row sums from A144562.at n=26A144640
- Numbers k such that both k and k^2/2 are averages of twin prime pairs.at n=22A152787
- Average of twin prime pairs with multiple and strictly distinct powers.at n=26A177426
- Lower Beatty array of the golden ratio, (1+sqrt(5))/2.at n=37A181886
- Greatest integer k such that k/Fibonacci(n) <= 3/4.at n=22A293631
- Average of twin prime pairs that is a product of two averages of twin prime pairs.at n=39A307758
- Sum of the even parts in the partitions of n into 6 parts.at n=36A309552
- Number of edges in an equilateral triangle "frame" of size n (see Comments in A328526 for definition).at n=11A333030
- Column 2 of triangle in A333278.at n=10A333280
- Numbers that are the sum of seven fourth powers in six or more ways.at n=32A345572
- Numbers that are the sum of seven fourth powers in exactly six ways.at n=24A345828