285285

Appears in sequences

• Lucky numbers that are concatenations of a number k with itself.at n=30A032650
• Numbers n such that the cyclotomic polynomial of order n has a nonzero coefficient which does not appear in any cyclotomic polynomials of lower order.at n=24A046887
• Means referred to in A093498.at n=14A093499
• Means referred to in A093498.at n=16A093499
• a(1) = 1, a(n+1) = prime(n)*Digit reversal of a(n).at n=8A095198
• Sequence of pairs numerator(s(n)), denominator(s(n)) where s(n) is the n-th partial sum of 1/A119753(n).at n=11A120341
• Products of 6 distinct odd primes.at n=1A168352
• a(n) = binomial(5*n+8, 4)/5 for n >= 0.at n=14A238473
• Product of all primes p not dividing n such that the sum of the base-p digits of n is at least p, or 1 if no such prime exists.at n=73A324370
• a(n) = Sum_{d|n} mu(n/d) * binomial(8*d,d) / (7*d+1).at n=5A346939
• Denominator of the second derivative of the n-th Bernoulli polynomial B(n,x).at n=73A366168
• a(n) is the conductor of extension of Q generated by character values of the n-th alternating group A_n; the smallest m such that the extension is a subfield of the m-th cyclotomic field Q(zeta_m).at n=18A376940
• Odd abundant numbers that are also doublets (cf. A020338).at n=13A380232
• a(n) is the smallest integer k such that A384237(k) = n.at n=20A385391
• Smallest k for which A384834(k) = n.at n=20A386557