28272

Appears in sequences

• Number of multigraphs with 4 nodes and n edges.at n=35A003082
• Least term in period of continued fraction for sqrt(n) is 7.at n=35A031431
• Numbers m such that m = sigma(abs(k)) - 3k, where k = sigma(m) - 3m.at n=2A069146
• Let S(n)=sigma(|n|)-3*n; sequence gives numbers n such that S(S(S(S(n))))=n. May be called {3,1}-Sociable number of orders 1 or 2 or 4.at n=2A114528
• Binomial transform of [1, 7, 17, 17, 6, 0, 0, 0, ...].at n=17A132117
• a(n) = 49*n^2 + 2*n.at n=23A157365
• Number of binary arrays indicating the locations of trailing edge maxima of a random length-n 0..6 array extended with zeros and convolved with -1,2,-1.at n=18A222041
• a(1) = 16, a(n) = sigma(a(n-1)).at n=11A257349
• Numbers m having greatest prime power divisor d such that d is smaller than the difference between m and the largest prime smaller than m and d is smaller than the difference between m and twice the largest prime smaller than m/2.at n=8A290290
• Numbers k such that (74*10^k + 313)/9 is prime.at n=19A294942
• Total volume of all rectangular prisms with dimensions q, p+q and |q-p| such that p and q are prime, n = p+q and p < q.at n=37A303231
• Sum of the even parts in the partitions of n into 7 parts.at n=36A309626
• Number of circular binary words of length n having the maximum possible number of distinct blocks of length floor(log_2 n) and floor(log_2 n)+1.at n=36A317586
• a(n) = r_4(n^2 + 1), where r_4(k) is the number of ways of writing k as a sum of 4 squares (A000118).at n=43A333173
• Triangle read by rows: T(n,k) is the number of linear chord diagrams on 2n vertices with one marked chord such that exactly k of the remaining n-1 chords contain the marked chord.at n=25A336600
• Number of integer partitions of n such that the maximum is greater than or equal to twice the median.at n=38A361859