34141

Properties

Appears in sequences

• Sextan primes: p = (x^6 + y^6)/(x^2 + y^2).at n=36A002647
• Numbers k such that the continued fraction for sqrt(k) has period 95.at n=28A020434
• Triangle, read by rows, defined by T(n,k) = T(n-1,k) + T(n,k-1) for nk>0, where T(n,0) = T(n-1,0) + T(n-1,n-1) and T(n,n) = T(n,n-1) for n>0 with T(0,0)=1.at n=43A129577
• Triangle, read by rows, defined by T(n,k) = T(n-1,k) + T(n,k-1) for nk>0, where T(n,0) = T(n-1,0) + T(n-1,n-1) and T(n,n) = T(n,n-1) for n>0 with T(0,0)=1.at n=44A129577
• Main diagonal of triangle A129577.at n=8A129579
• a(n) = 4*a(n-1) - 6*a(n-2) + 6*a(n-3) - 3*a(n-4), with initial terms 0, 0, 0, 1.at n=15A137247
• Eigentriangle for the Catalan triangle (c(x), xc(x)), A033184.at n=46A181644
• Primes having only {1, 3, 4} as digits.at n=42A199341
• Array: row n shows the coefficients of the characteristic polynomial of the n-th principal submatrix of the symmetric matrix A202874; by antidiagonals.at n=48A202875
• Larger of emirp pairs that are merely reversals of their end digits.at n=27A263242
• Primes p such that the sum of the squares of digits of p equals the sum of digits of p^2.at n=14A290972
• Number of connected graphs on n unlabeled nodes with exactly 2 cycles joined along two or more edges but not more than half each cycle and all nodes having degree at most 4.at n=9A305132
• Primes whose index is divisible by the product of its digits.at n=36A306766
• a(n) = Sum_{k=0..floor(n/4)} Stirling2(k,n - 4*k).at n=44A357941
• Prime numbersat n=3648