50094
domain: N
Appears in sequences
- Numbers k for which the quotient q(k)=(k+rev(k))/abs(k-rev(k)) is an integer.at n=23A087993
- Number of partitions of n times number of divisors of n.at n=31A141667
- a(n) = (2*n^3 + 5*n^2 + 11*n)/2.at n=35A162263
- Number of (w,x,y,z) with all terms in {1,...,n} and w>=2x and y<=3z.at n=22A212521
- Number of n X 4 0..1 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing.at n=18A223834
- The hyper-Wiener index of the Kneser graph K(n,2) (n>=5).at n=19A228307
- a(n) = Product_{d|n} T(d) where T(x) = x*(x+1)/2 = A000217(x) = x-th triangular number.at n=21A275786
- Numbers k such that R(k)/k is of the form m/(m + 1), where R(k) is the digital reversal of k.at n=9A376260
- a(n) is the first number that is the sum of two palindromic primes in exactly n ways.at n=10A379138