56808

Appears in sequences

• T(2n,n), array T as in A047130.at n=7A047139
• Numbers n such that sigma(n) = phi(prime(n)+1).at n=26A067625
• Triangle of generalized Stirling numbers S_{3,3}(n,k) read by rows (n>=1, 3<=k<=3n).at n=17A078741
• Initial members of abundant quintuplets, i.e., values of k such that (k, k+2, k+4, k+6, k+8) are all abundant numbers.at n=11A108926
• Row sums of number triangle A116382.at n=14A116383
• Wiener index of the n X n knight graph.at n=9A292054