30287

Appears in sequences

• a(n+1) is the smallest number > a(n) such that the digits of a(n)^2 are all (with multiplicity) contained in the digits of a(n+1)^2, with a(0)=1.at n=23A014563
• Numbers k such that 2^k + 3^(k-1) is prime.at n=51A082400
• a(n) = n*(2*n^2 + n + 1)/2.at n=30A085786
• Numbers k such that k + (largest digit of k)! is a palindromic prime.at n=14A095920
• Number of ordered triples (w,x,y) with all terms in {-n,...-1,1,...,n} and w+x+y>1.at n=20A211613
• Semiprimes of the form C(n) + T(n) where C(n) and T(n) are the n-th cube and triangular numbers.at n=8A240884
• Semiprimes generated by the polynomial 2 * n^2 + 29.at n=33A241554
• Composite numbers of the form 2*k^2 + 29.at n=33A352949
• Expansion of Sum_{k>=1} k^3 * x^k/(1 - x^k)^3.at n=30A366135