49376

Appears in sequences

• Expansion of e.g.f. tan(tan(x) * log(x+1)).at n=8A012354
• Expansion of e.g.f. arctanh(tan(x) * log(x+1)).at n=8A012358
• Automorphic numbers: numbers k such that k^6 ends with k. Also m-morphic numbers for all m not congruent to 26 (mod 50) but congruent to 6 (mod 10).at n=36A068408
• This table shows the coefficients of combinatorial formulas needed for generating the sequential sums of p-th powers of binomial coefficients C(n,4). The p-th row (p>=1) contains a(i,p) for i=1 to 4*p-3, where a(i,p) satisfies Sum_{i=1..n} C(i+3,4)^p = 5 * C(n+4,5) * Sum_{i=1..4*p-3} a(i,p) * C(n-1,i-1)/(i+4).at n=30A087108
• E.g.f. exp(sum_{d|M} (exp(d*x)-1)/d), M=9.at n=5A141006
• Numbers k such that product of divisors of k ends with k and k is nonprime (A018252).at n=20A278473
• Smallest k such that in the pairs of numbers j*k +- 1, none is prime for 1 <= j < n but at least one is prime for j = n; or 0 if no such k exists.at n=26A348347