3080025

Appears in sequences

• n in base 8 is a palindromic square.at n=23A029806
• Numbers k such that Sum_{i=1..k} gcd(k,i) divides Sum_{i=1..k} lcm(k,i).at n=25A072109
• Odd abundant numbers whose abundance is odd.at n=11A156942
• Number generated by regarding the numbers in row n of A157454 as digits of a base n number.at n=7A157455
• Read n-th row of triangle in A157458 and regard it as the expansion of a number in base n+1.at n=7A157457
• Half the number of length n integer sequences with sum zero and sum of squares 6272.at n=4A157588
• Odd numbers k such that sigma(k) > 2*k and A003415(sigma(k)) < k, where A003415 is the arithmetic derivative, and sigma is the sum of divisors function.at n=4A347890