201597

Appears in sequences

• Numbers k such that k and k+1 have the same sum but an unequal number of divisors.at n=25A054007
• Expansion of series related to Liouville's Last Theorem: g.f. sum_{t>0} (-1)^(t+1) *x^(t*(t+1)/2) / ( (1-x^t)^8 *product_{i=1..t} (1-x^i) ).at n=14A059825
• Numbers k such that k and k+1 have the same sum of unitary and nonunitary divisors.at n=17A064729
• Numbers k such that sigmawt(k) = sigmawt(k+1), where sigmawt(k) is the sum of the divisors of k weighted by divisor multiplicity in k.at n=18A171183
• Triangle T(n,k) giving the largest member of "the infinite trunk of factorial beanstalk" (A219666) whose factorial base representation contains n digits (A084558) and the most significant such digit (A099563) is k.at n=31A230429
• Numbers k such that s(k) = s(k+1) where s(k) is the sum of unitary, squarefree divisors of k, including 1 (A092261).at n=29A327875
• Numbers k such that s(k) = s(k+1), where s(k) is the sum of recursive divisors of k (A333926).at n=35A333949
• Numbers k such that A051378(k) = A051378(k+1).at n=37A349283