19993

Properties

Appears in sequences

• Number of squares on infinite chessboard at <= n knight's moves from a fixed square.at n=38A018836
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 94 ones.at n=20A031862
• "CGK" (necklace, element, unlabeled) transform of 2,1,1,1,...at n=28A032157
• Numbers n such that 219*2^n-1 is prime.at n=11A050861
• Primes with either no internal digits or all internal digits are 9.at n=50A069684
• Numerator of the expansion of e^(x + x^2 + x^3 + x^4).at n=7A090754
• Stable Poincaré series [or Poincare series] for Lie algebra of type A (i.e., the variety of complex k X k matrices with distinct eigenvalues).at n=22A098787
• Primes with digit sum = 31.at n=33A106767
• Primes p such that p's set of distinct digits is {1,3,9}.at n=36A108383
• Primes congruent to 51 mod 59.at n=35A142778
• Primes congruent to 46 mod 61.at n=38A142844
• Partial sums of A151791.at n=36A151792
• Primes p such that p*(p-1)/2-5 and p*(p-1)/2+5 are also prime numbers.at n=38A164623
• Primes containing 999 as a substring.at n=6A167292
• Primes of the form 2*10^k-7.at n=3A177508
• Primes of the form floor(k^sqrt(Pi)).at n=40A180452
• G.f.: A(x) = Sum_{n>=0} x^(n^2) / Product_{k=1..n} (1 - x^k)^n.at n=25A193197
• E.g.f.: exp(x+x^2+x^3+x^4).at n=7A193930
• Primes of the form 2n^2 - 7.at n=29A201714
• Primes of the form 8n^2 - 7.at n=11A201858