65856

Appears in sequences

• Expansion of e.g.f.: exp(exp(x)-cos(x))=1+x+3/2!*x^2+8/3!*x^3+29/4!*x^4+112/5!*x^5...at n=9A013309
• Palindromes with exactly 10 prime factors (counted with multiplicity).at n=5A046336
• Palindromes with exactly 10 palindromic prime factors (counted with multiplicity).at n=2A046384
• Numbers k such that the square of d(k) (number of divisors) divides k.at n=25A046754
• a(n) = Sum_{d|n} phi(d)*2^(n/d).at n=16A053635
• Low-temperature partition function expansion for square lattice (Potts model, q=4).at n=17A057381
• Triangular array T(n,k) read by rows, giving number of labeled free trees such that the root is smaller than all its children, with respect to the number n of vertices and to the label k of the root.at n=25A071211
• Palindromes in A002473, that is, palindromes with the largest prime divisor < 10.at n=14A085134
• Areas of (not necessarily primitive) Pythagorean triangles which are palindromes.at n=4A101450
• a(n) = 3*n^3.at n=28A117642
• Numbers k such that k^6 + 82991 is prime.at n=13A126893
• Number of collinear triples of distinct points in Zn x Zn with no two on the same "horizontal" or "vertical" line.at n=13A146557
• Partial sums of A160410.at n=39A160799
• Triangle, read by rows, T(n, k) = (-1)^n*(n!/k!)^2*binomial(n-1, k-1).at n=33A169656
• Numbers k such that tau(sigma(k)) = rad(k).at n=25A173581
• Numbers with prime factorization pq^3r^6.at n=15A190467
• Constant term of the reduction by x^2->x+1 of the polynomial p(n,x) defined below in Comments.at n=21A192757
• Largest palindrome formed by using n single-digit numbers and the operators +, -, * and / where concatenation is not allowed.at n=5A196509
• Area A of the triangles such that A, the sides and one of the altitudes are four consecutive integers of an arithmetic progression d.at n=27A210645
• Numbers whose square is both a sum and a difference of two positive cubes.at n=17A230716