24724

Appears in sequences

• a(n) = (n^3 + 2*n)/3.at n=42A006527
• Intrinsic 10-palindromes: n is an intrinsic k-palindrome if it is a k-digit palindrome in some base.at n=36A060947
• a(n) = 2 + floor((1 + Sum_{j=1..n-1} a(j))/5).at n=52A120171
• Numbers k such that k and k^2 use only the digits 1, 2, 4, 6 and 7.at n=29A136993
• One third of product plus sum of three consecutive nonnegative integers; a(n)=(n+1)(n^2+2n+3)/3.at n=41A167875
• Least number k such that (n!+k)/n and (n!-k)/n are both prime.at n=25A245697
• Indices of powers of two in A055744 (the sequence of n that have the same prime power set as phi(n)).at n=30A256248