19637

Appears in sequences

• a(n) = least k such that 1+2+...+k >= E{1,2,...,n}, where E is the 3rd elementary symmetric function.at n=43A027917
• Nonprime numbers k such that sum of aliquot divisors of k is a cube.at n=43A048698
• Molien series for group G_{1,3} of order 2304.at n=16A051461
• Molien series for group G_{1,3}^{8} of order 4608.at n=8A051463
• Numbers k such that (10^k - 1)/9 + 2*10^floor(k/2) is a palindromic wing prime (a.k.a. near-repdigit palindromic prime).at n=4A077779
• Members of A038512 of the form k, k+2, k+6, k+8.at n=34A155511
• a(n) is the largest number k such that there is no pair p+q = 2*k of two non-consecutive primes p < q with p-2*n,p or p,p+2*n consecutive primes and q-2*n,q or q,q+2*n consecutive primes.at n=4A159812
• Indices of records in A159918.at n=20A230097
• a(n) = smallest m such that wt(m^2) = n (where wt(i) = A000120(i)), or -1 if no such m exists.at n=23A231897
• Number of permutations of [n] with exactly eight (possibly overlapping) occurrences of the generalized pattern 12-3.at n=3A264457
• Numbers having in binary representation more zeros than their squares.at n=3A293655
• Numbers n for which R(n) + 2*10^floor(n/2) is prime, where R(n) = (10^n-1)/9.at n=20A331865
• a(n) is the least k such that k^2 has a maximal Hamming weight A357658(n) in the range 2^n <= k^2 < 2^(n+1).at n=26A357659
• a(n) is the largest k such that k^2 has a maximal Hamming weight A357658(n) in the range 2^n <= k^2 < 2^(n+1).at n=26A357660
• a(n) is the least k such that B(k^2) - B(k) = n, where B(m) is the binary weight A000120(m).at n=15A357750