28960854

Appears in sequences

• Triangle read by rows: T(n,m) = Prime[m]^n*(Prime[m] - 1)/2.at n=20A121057
• Numbers k such that the k-th cyclotomic polynomial has a root mod 13.at n=40A245481
• Numbers k such that A007913(k) divides sigma(k) and A008833(k)-1 either divides A326127(k) (= sigma(k)-core(k)-k), or both are zero.at n=33A336641
• Square array read by antidiagonals upwards in which T(n,m) is the n-th number whose symmetric representation of sigma consists of m copies of unimodal pattern 121 (separated by 0's if m > 1).at n=27A372180
• a(n) is the smallest number whose symmetric representation of sigma consists of n copies of unimodal pattern 121 (separated by 0's if n > 1).at n=6A372181