28122

Appears in sequences

• Starting positions of strings of three 9's in the decimal expansion of Pi.at n=33A083642
• Smallest sets of 7 consecutive abundant numbers in arithmetic progression. The initial abundant number is listed.at n=14A228964
• Numbers n such that the sum of the triangular numbers T(n) and T(n+1) is equal to the sum of the octagonal numbers N(m) and N(m+1) for some m.at n=5A251793