83232

Appears in sequences

• Numbers n such that n / product of digits of n is a square.at n=25A001104
• Theta series of 8-d 6-modular lattice G_2 tensor F_4 (or A_2 tensor D_4) with det 1296 and minimal norm 4 in powers of q^2.at n=22A028977
• a(n) = n*(n-1)^2*(n-2).at n=16A047928
• Second column (k=3) sequence of array ((7,2)-Stirling2) divided by 14.at n=2A091551
• Euler's totient function applied to tribonacci numbers.at n=20A107647
• Powerful numbers (definition 1) sandwiched between twin primes.at n=14A113839
• Riordan array (1/(1-2x), x(1-x)/(1-2x)^2).at n=58A114164
• a(n) = (n-th prime)^4-(n-th prime)^2.at n=6A138402
• Averages of twin prime pairs k such that k*2 and k/2 are squares.at n=12A154670
• Number of reduced words of length n in Coxeter group on 18 generators S_i with relations (S_i)^2 = (S_i S_j)^3 = I.at n=4A162804
• Sequence of the "Natural Jewels": a natural jewel is a number that is totally enclosed by prime numbers in a version of Ulam Spiral.at n=30A172294
• Numbers k > 9 with digits different from 0 and 1 such that both the sum of digits and the product of digits divide k.at n=20A172424
• Oblong numbers that are the product of two oblong numbers.at n=20A188660
• Numbers with prime factorization p^2*q^2*r^5 where p, q, and r are distinct primes.at n=7A190114
• Sum of positive even numbers up to n^2.at n=23A235367
• n^2 * a(n) = 3*(5*n^2 - 5*n + 2) * a(n-1) - 16*(5*n^2 - 10*n + 6) * a(n-2) + 36*(5*n^2 - 15*n + 12) * a(n-3) - 144*(n-2)^2 * a(n-4), with a(0)=1, a(1)=6, a(2)=30, a(3)=144.at n=7A276022
• Numbers n such that 2^n == 1 (mod sigma(n)).at n=29A278836
• Numbers n such that phi(n) * tau(n) divides n^2, but neither tau(n) nor phi(n) divides n.at n=10A287800
• Wiener index of the graph of nodes (i,j) of the square lattice such that abs(i) + abs(j) <= n.at n=8A302298
• Crossing number of the n-crown graph (conjectured).at n=35A307182