21464

Appears in sequences

• Numbers k that divide the sum of the first k composite numbers.at n=13A053781
• n^3+Smallest square, (Smallest square >= n^3).at n=22A176581
• Number of n X n 0..2 arrays with top left element 0, horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and antidiagonal differences never 0.at n=4A229396
• Number of n X 5 0..2 arrays with top left element 0, horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and antidiagonal differences never 0.at n=4A229399
• T(n,k)=Number of nXk 0..2 arrays with top left element 0, horizontal differences mod 3 never 1, vertical differences mod 3 never -1, and antidiagonal differences never 0.at n=40A229402
• Numbers k such that k^3 - b2 is a triangular number (A000217), where b2 is the largest square less than k^3.at n=34A233401
• G.f. A(x) satisfies: A(x) = (1 + x) * A(x^2)*A(x^3)*A(x^5)* ... *A(x^prime(k))* ...at n=50A308272
• Number of ways to write n as an ordered sum of 8 nonprime numbers.at n=26A341485