18550

Appears in sequences

• a(n) is the position of cube of the n-th prime among the powers of primes (A000961).at n=16A024625
• Positions of cubes among the powers of primes (A000961).at n=25A024627
• Numbers which can be expressed as the product of a number and its reversal in at least two different ways.at n=13A066531
• Integers that are Rhonda numbers to base 8.at n=7A100970
• a=b=c=0;c(n)=c+n+a;b(n)=b+n+c;a(n)=a+n+b.at n=8A152896
• Sum of the first k-1 numbers in the k-th column of the natural number array A000027, by antidiagonals.at n=25A185788
• Number of (n+1) X 3 0..1 arrays with rows and columns of determinants of all 2 X 2 subblocks lexicographically nondecreasing.at n=4A204794
• Number of (n+1)X6 0..1 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing.at n=1A204797
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing.at n=16A204800
• T(n,k)=Number of (n+1)X(k+1) 0..1 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing.at n=19A204800
• Lesser of amicable pair m < n defined by t(n) = m and t(m) = n where t(n) = psi(n) - n and psi(n) = A001615(n) is the Dedekind psi function.at n=11A323329
• Triangle T(n,k) defined by Sum_{k=1..n} T(n,k)*u^k*x^n/n! = exp(Sum_{n>0} u*sigma(n)*x^n/n!).at n=32A338871