191844

Appears in sequences

• Smallest nontrivial extension of n-th palindrome which is a square.at n=27A030676
• Smallest nontrivial extension of n-th palindromic prime which is a square.at n=9A030681
• a(n) = (p^3 - p^2)/2, where p = prime(n).at n=20A138416
• Result of using the positive integers 1,2,3,... as coefficients in an infinite polynomial series in x and then expressing this series as Product_{k>=1} (1+a(k)x^k).at n=43A147654
• Number of bases to which terms of A194946 are pseudoprime.at n=35A195327
• Squares which are a decimal concatenation of triprimes.at n=32A225151
• Squares representable as k*m + k + m, where k >= m > 1 are squares.at n=27A256074
• Primitive exponential abundant numbers: the powerful terms of A129575.at n=36A328136
• Squares in A353729.at n=8A367451
• Primitive exponential unitary abundant numbers: the powerful terms of A383693.at n=33A383694
• Primitive exponential squarefree exponential abundant numbers: the powerful terms of A383697.at n=30A383698
• Primitive exponential Zumkeller numbers: powerful numbers whose exponential divisors can be partitioned into two disjoint subsets of equal sum.at n=40A391087
• Primitive exponential unitary Zumkeller numbers: powerful numbers whose exponential unitary divisors can be partitioned into two disjoint subsets of equal sum.at n=36A391089
• Primitive exponential pseudoperfect numbers: powerful numbers equal to the sum of a subset of their proper exponential divisors.at n=39A391143
• Primitive exponential admirable numbers: the powerful terms in A336680.at n=28A391283
• Exponential abundant numbers that are squares of squarefree numbers.at n=22A391428