79420

Appears in sequences

• a(n) = n*(n-1)*A056219(n+1).at n=18A166870
• Bases with a record -- new or tie -- smallest 'stem value' for which a prime by concatenation of decrements exists.at n=30A220402
• Numbers which are both the sum of n+1 consecutive triangular numbers and the sum of the n-1 immediately following triangular numbers.at n=10A222716
• Numbers that are values of the totient function (A002202) but not of the reduced totient function (A002174).at n=26A270265
• a(n) = (n + 2)*(n^2 + n - 1).at n=42A318765