23730

Appears in sequences

• Number of tree-rooted toroidal maps with 3 faces and n vertices and without separating loops.at n=2A006440
• a(n) = [ a(n-1)/a(1) ] + [ a(n-1)/a(2) ] + ... + [ a(n-1)/a(n-1) ] for n >= 3, with initial terms 1,2.at n=14A022862
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 22.at n=13A031700
• Number of ways to break {1,2,3,...,n} into sets with equal sums.at n=17A035470
• Numbers n such that the Diophantine equation x^4+y^5=n^4 has solutions.at n=36A070756
• a(n) = n*(n - 1)*(n^2 + 1)/2.at n=15A071252
• a(n) = 484*n^2 + 2*n.at n=6A158325
• a(n) = 196*n^2 + 14.at n=11A158555
• a(n) = (2*n^3 + 5*n^2 - 13*n)/2.at n=27A162262
• a(n) = 121*n^2 + n.at n=13A173267
• A binomial conjugate of the Narayana numbers.at n=61A177896
• a(n) = floor((n + 1/2)^5).at n=7A219088
• Numbers n for which 2 < A257993(A276086(A276086(n))) < A257993(n), where A276086 converts the primorial base expansion of n into its prime product form, and A257993 returns the index of the least prime not present in its argument.at n=14A328762
• a(n) = A328842(A276086(n)).at n=57A328844
• Number of ways to write n as an ordered sum of 10 primes.at n=13A340966
• Expansion of e.g.f. 1/(1 + x/4 * log(1 - 2 * x)).at n=7A354327
• Products of 5 distinct primes that are sandwiched between squarefree semiprime numbers.at n=21A376949
• Number of words of length n over an infinite alphabet such that for any letter k appearing within a word the letter k appears at least k times.at n=9A386254