27083

Appears in sequences

• Integer part of ((4th elementary symmetric function of 2,3,...,n+4)/(2nd elementary symmetric function of 2,3,...,n+4)).at n=30A024181
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 21 ones.at n=15A031789
• Second elementary symmetric function of the first n terms of (2,2,3,3,4,4,5,5...).at n=26A203299
• Greatest binary palindrome (cf. A006995) with n binary digits such that the number of contiguous palindromic bit patterns is minimal.at n=14A217098
• Binary palindromes (cf. A006995) such that the number of contiguous palindromic bit patterns is minimal (for a given number of places).at n=37A217099
• Let f(p,i) = smallest prime m >= p such that m == i (mod p); a(n) = Sum_{i=0..p-1} f(p,i), where p = n-th prime.at n=20A243076
• Number of nX3 nonnegative integer arrays with upper left 0 and lower right n+3-4 and value increasing by 0 or 1 with every step right or down.at n=11A252871
• Number of integer-sided polygons having perimeter n, modulo rotations but not reflections.at n=16A293820
• Numbers n with the property that n^2 contains a sequence of four or more consecutive 8's.at n=14A301938
• Square array A(n, k) = A048720(A065621(sigma((2n-1)^2)), sigma((2k-1)^2)), read by falling antidiagonals, (1,1), (1,2), (2,1), (1,3), (2,2), (3,1), etc.at n=58A379221