53088

Appears in sequences

• Numbers n such that 203*2^n-1 is prime.at n=15A050853
• Numbers k that divide the sum of the partition numbers to k.at n=8A058856
• Number of different shapes formed by bending a piece of wire of length n in the plane.at n=21A066372
• Amicable triples: numbers such that sigma(x) = sigma(y) = sigma(z) = x+y+z, x<y<z. We order these triples according to the common value of sigma. Sequence gives x numbers.at n=10A125490
• Let P be Pascal's triangle A007318 and let N be Narayana's triangle A001263, both regarded as lower triangular matrices. Sequence gives triangle obtained from P*N, read by rows.at n=48A126182
• Triangle read by rows: T(n,k) is the number of skew Dyck paths of semilength n and having k UU's (doublerises) (n >= 1; 0 <= k <= n-1).at n=51A128718
• Numbers k such that both k and k^2/2 are averages of twin prime pairs.at n=32A152787
• Averages of twin prime pairs which can be represented as a sum of three consecutive of such pair averages.at n=34A160917
• Triangle read by rows: T(n,k) is the number of bargraphs of semiperimeter n having k L-shaped corners (n>=2, k>=0).at n=45A273717