22032

Appears in sequences

• a(n) = (11*n+1)*(11*n+10).at n=13A001536
• Base 5 digital convolution sequence.at n=13A033642
• Number of branched catafusenes with n condensed hexagons.at n=10A036359
• Number of permutations of 1..n in which every pair of adjacent numbers are relatively prime.at n=10A076220
• Sum of divisors of numbers containing in their decimal representation only the digits 0 and 1.at n=29A077810
• a(n) = smallest k such that tau(k)= n*tau(k-1) where tau(k) = number of divisors of k, or 0 if no such number exists.at n=24A086551
• Number of ways to arrange the numbers 1..n in a circle (up to direction) such that every two adjacent numbers are relatively prime.at n=10A086595
• Number of permutations of (the positive integers <= n and coprime to n), where each element of the permutations is coprime to its adjacent elements.at n=10A109813
• a(n) = (9/2)*(n-1)*(n-2)*(n-3).at n=18A134171
• Triangle read by rows: T(n,0) = 3^n, T(n,k) = T(n,k-1) + T(n-1,k) for 0 < k < n, and T(n,n) = T(n,n-1).at n=39A165992
• Totally multiplicative sequence with a(p) = 2*(5p-1) = 10p-2 for prime p.at n=27A167333
• Numbers with 50 divisors.at n=4A175756
• Number of nondecreasing arrangements of 8 numbers x(i) in -(n+6)..(n+6) with the sum of sign(x(i))*2^|x(i)| zero.at n=10A187992
• Numbers with prime factorization pq^4r^4.at n=4A190012
• Composite numbers such that sum_{i=1..k} (p_i/(p_i+1))/product_{i=1..k} (p_i/(p_i+1)) is an integer, where p_i are the k prime factors of n (with multiplicity).at n=21A227248
• T(n,k) is the number of s in {1,...,n}^n having longest contiguous subsequence with the same value of length k; triangle T(n,k), n>=1, 1<=k<=n, read by rows.at n=41A228154
• Smallest k such that z = n in the minimal value of x + y*z, given x*y + z = k (for positive integers x, y, z).at n=10A228288
• T(n,k)=Number of nXk 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally, diagonally or antidiagonally.at n=46A232920
• Number of 2 X n 0..2 arrays with no element x(i,j) adjacent to value 2-x(i,j) horizontally, diagonally or antidiagonally.at n=8A232921
• a(n) = 17*n^2.at n=36A244630