23125

Appears in sequences

• a(n) = (2*n - 13)*n^2.at n=25A015246
• Numbers that are the sum of 2 nonzero squares in exactly 5 ways.at n=7A025288
• Numbers that are the sum of 2 nonzero squares in 5 or more ways.at n=23A025296
• Numbers that are the sum of 2 distinct nonzero squares in exactly 5 ways.at n=5A025306
• Numbers that are the sum of 2 distinct nonzero squares in 5 or more ways.at n=21A025315
• Number of partitions of n into parts not of the form 13k, 13k+5 or 13k-5. Also number of partitions with at most 4 parts of size 1 and differences between parts at distance 5 are greater than 1.at n=42A035953
• House numbers (version 2): a(n) = (n+1)^3 + (n+1)*Sum_{i=0..n} i.at n=24A050509
• a(n) = Sum_{d|n} phi(d^3).at n=33A068963
• Least k such that the decimal representation of k*n contains only 1's and 0's.at n=47A079339
• Least k such that decimal representation of k*n contains only digits 0 and 5.at n=23A096684
• Numbers n which are the hypotenuse of a Pythagorean triple with n' as a leg, where n' is the arithmetic derivative of n.at n=2A211176
• Numbers k such that k^3 - b2 is a triangular number (A000217), where b2 is the largest square less than k^3.at n=35A233401
• Numbers that are the sum of 2 squares in exactly 5 ways.at n=11A294716
• Numbers m such that the largest digit in the decimal expansion of 1/m is 4.at n=15A351470
• Odd numbers m such that there exists no k for which the denominator of d(k)/k = m where d(k) is the number of divisors of k (A000005).at n=18A353320
• Expansion of Sum_{k>0} (1/(1-x^k)^5 - 1).at n=23A363695
• Numbers whose prime indices have more than one permutation with all equal run-sums.at n=34A383015
• Square array A(n,k), n>=0, k>=0, read by antidiagonals downwards, where column k is the expansion of 1/(1 - k*x) * Product_{j=0..k-1} (1 + j*x)/(1 - j*x).at n=49A383818