25215

Appears in sequences

• Starting with a(0) = 1, smallest number k > a(n-1) such that, for all a(m) with m < n, k + a(m) is not squarefree.at n=14A080793
• Equal count of primes congruent to 1 mod 4 and 3 mod 4 associated with primes in A007351 (the zero beginning the sequence indicates the prime 2).at n=22A092198
• a(n) = n*(n^3 - n + 2)/2.at n=15A101374
• a(2*n+1) = 7*a(n), a(2*n+2) = 8*a(n) + a(n-1).at n=36A116554
• Triangle of 3-Eulerian numbers.at n=25A144697
• Partial sums of A051442, starting at n=1.at n=4A145329
• Great rhombicosidodecahedron with faces of centered polygons.at n=7A193253
• Numbers k such that 3^k + 14 is prime.at n=26A219035
• Number of 2 X 2 matrices with all terms in {-n,..,0,..,n} and (sum of terms) = determinant.at n=24A281194
• a(n) is the smallest number > 1 whose base n digits yield the original number when added and multiplied left to right; or 0 if no such number exists.at n=17A334916
• Numbers k such that sigma(k) = psi(k) + 2 * tau(k).at n=36A387962