196560

Appears in sequences

• Maximal kissing number of n-dimensional laminated lattice.at n=24A002336
• Number of 3-edge-colored connected trivalent graphs with 2n labeled nodes.at n=2A006713
• Theta series of Leech lattice.at n=2A008408
• Leading coefficient of extremal theta series of even unimodular lattice in dimension 24n.at n=1A034597
• Numerators of Fourier coefficients of Eisenstein series of degree 2 and weight 12 when evaluated at Gram(A_2)*z.at n=2A037148
• A triangle of numbers related to triangle A030524.at n=41A049352
• Coefficients of J(0)*theta_3(z) where J(0) is sequence A056945.at n=8A056946
• a(n) = A062401(A065391(n)): phi(sigma(m)) peak values for numbers m (listed in A065391) at which those peaks are first reached.at n=35A065392
• Square root of b_1*b_2*...*b_t corresponding to smallest values of t in R. L. Graham's sequence (A006255).at n=51A066401
• Numbers k such that k = phi(sigma(phi(sigma(k)))).at n=23A067883
• Smallest k such that d(phi(k)) - phi(d(k)) = -n, where d(k) = A000005(k) and phi(k) = A000010(k).at n=13A078151
• a(n) = C(n+3,3)*n^3/4.at n=12A085284
• Numbers that can be expressed as the difference of the squares of primes in exactly ten distinct ways.at n=13A092006
• Number of non-palindromic divisors of n sets a new record.at n=36A093037
• a(n) = Jacobsthal(n) * Fibonacci(n).at n=12A093042
• A062401(x)=phi[sigma(x)] function is iterated; initial value=2^n; a(n)=largest term of trajectory.at n=15A096999
• Value of Product_{k=1..n} sigma(k)/sd(k,2), where sd(k,b) is the sum of the digits of k represented in base b.at n=8A109491
• Product of the first n (semiprimes - 1).at n=5A112228
• a(n) = the smallest positive integer with exactly n positive "non-isolated divisors". A divisor, k, of n is non-isolated if (k-1) or (k+1) also divides n.at n=26A133996
• Amicable triples. Sequence gives sigma values: A125490(n) + A125491(n) + A125492(n).at n=11A137231