54182

Appears in sequences

• T(n,k)=Number of idempotent n X n 0..k matrices.at n=19A222821
• Number of idempotent 5X5 0..n matrices.at n=1A222824
• Number of (n+4)X(n+4) 0..2 matrices with each 5X5 subblock idempotent.at n=0A224617
• Number of (n+4)X5 0..2 matrices with each 5X5 subblock idempotent.at n=0A224618
• T(n,k)=Number of (n+4)X(k+4) 0..2 matrices with each 5X5 subblock idempotent.at n=0A224625
• Numbers n such that 13^n is the highest power of 13 dividing A240751(n).at n=22A286007
• First component A of the pairs (A, B), listed in increasing order, such that the multiset of digits of A union the multiset of digits of B equals the multiset of digits of A^2 and the multiset of digits of B^2, for some B >= A. Note that terms may be repeated.at n=21A389379