87750

Appears in sequences

• Expansion of e.g.f. exp(arcsin(x)-arctanh(x)).at n=10A013430
• cosh(arcsin(x)-arctanh(x))=1+10/6!*x^6+840/8!*x^8+87750/10!*x^10...at n=5A013436
• sec(arcsin(x)-arctanh(x))=1+10/6!*x^6+840/8!*x^8+87750/10!*x^10...at n=5A013437
• Expansion of e.g.f. exp(arctan(x)-arcsinh(x)) = 1-1/3!*x^3+15/5!*x^5+10/6!*x^6-495/7!*x^7...at n=10A013461
• Amicable triples: numbers such that sigma(x) = sigma(y) = sigma(z) = x+y+z, x<y<z. We order these triples according to the common value of sigma. Sequence gives y numbers.at n=18A125491
• a(n) = E(k)*C(n+k,k) = Euler(k)*binomial(n+k,k) for k=4.at n=23A154286
• Larger member of primitive friendly pairs ordered by smallest maximal element.at n=36A233039
• a(n) = binomial(floor(n/2),4) + (ceiling(n/2)-3)*binomial(floor(n/2),3).at n=54A234277
• Number of nonisomorphic proper colorings of partition star graph using six colors.at n=33A297570
• A008336(n) is divisible by the product of the primes p such that n/2 <= p < n; a(n) is the quotient.at n=44A370971