131040

Appears in sequences

• Denominator of B_{2n}/(-4n), where B_m are the Bernoulli numbers.at n=12A006863
• Number of Barlow packings with group P63/mmc(S) that repeat after 4n layers.at n=17A011946
• Numbers k such that sigma(k) >= 4*k.at n=20A023198
• Eisenstein series E_24(q) (alternate convention E_12(q)), multiplied by 236364091.at n=1A029831
• a(n) = n*(2*n-1)*(2*n+1).at n=32A035328
• Largest number having binary order n (A029837) and of which the number of divisors is maximal in that range of g(k) = n.at n=17A036493
• Number of 2n-bead balanced binary necklaces of fundamental period 2n which are equivalent to their reverse, complement and reversed complement.at n=36A045683
• Number of labeled pure 2-complexes on n nodes (0-simplexes) with 5 2-simplexes and 8 1-simplexes.at n=11A054559
• Largest number of binary size n (i.e., between (n-1)-th and n-th powers of 2) with the following property: cube of its number of divisors is larger than the number itself.at n=16A056767
• Number of labeled n-node 4-valent graphs containing a single double edge.at n=8A058830
• Numbers k such that gcd(sigma(k),k) = k/5.at n=18A067237
• Numbers k such that sigma(k) > 4*k.at n=18A068404
• List of codewords in binary lexicode with Hamming distance 11 written as decimal numbers.at n=3A075949
• (1/2)*A075998.at n=11A076001
• Let r(n) be the real positive root of Sum_{k=1..n} x^k = 1, then a(n) = round(1/(r(n) - 1/2)).at n=14A079460
• Largest number m such that a^n == 1 (mod m) whenever a is coprime to m.at n=23A079612
• Numbers k such that there is a proper divisor d of k satisfying sigma(d)=k.at n=8A081756
• Numbers k such that sigma(k) divides k^2.at n=36A090777
• Number of non-palindromic divisors of n sets a new record.at n=34A093037
• Denominators of n divided by the product of the anti-divisors of n.at n=42A093396