28133

Appears in sequences

• Consider the family of multigraphs enriched by the species of partitions. Sequence gives the triangle read by rows giving coefficients of polynomials arising from enumeration of those multigraphs on n arcs of 7 different colors.at n=10A098362
• a(n) = p^2 - sum of digits of p^p, where p = prime(n).at n=39A140499
• Numbers k such that for some r we have phi(1) + ... + phi(k - 1) = phi(k + 1) + ... + phi(k + r), where phi(i) = A000010(i).at n=14A358936