50993

Properties

Appears in sequences

• a(n) = Sum_{i=0..n} Sum_{j=0..n} T(i,j), T given by A026769.at n=13A026778
• Number of polyhexes of class PF2 with a particular symmetry.at n=16A030525
• Number of self-complementary 4-multigraphs on n nodes.at n=6A053588
• a(1) = 1; for n > 1, a(n) = largest prime divisor of A062273(n).at n=6A077576
• Primes p such that (3^p - 3^((p + 1)/2) + 1)/7 is prime.at n=9A125743
• Primes p such that 2p+1, 3p+2 and 5p-2 are also primes.at n=38A178068
• Numbers n such that the Eisenstein integer ((1-ω)^n+1)/(2-ω) has prime norm, where ω = - 1/2 + sqrt(-3)/2.at n=21A239842
• Growth series for affine Coxeter group (or affine Weyl group) D_6.at n=16A266761
• Prime p1 of consecutive primes p1, p2, where p2 - p1 = 8, and p1, p2 are in different centuries.at n=33A287049
• Primes p such that A001175(p) = 2*(p+1)/9.at n=37A308786
• Prime numbersat n=5222