196308

Appears in sequences

• Number of primitive (period n) periodic palindromic structures using a maximum of two different symbols.at n=36A056513
• Number of primitive (period n) periodic palindromic structures using exactly two different symbols.at n=35A056518
• a(n) = Sum_{k <= 10^n} cototient(k), where cototient is A051953.at n=3A064016
• Number of length n+5 0..1 arrays with every six consecutive terms having the maximum of some three terms equal to the minimum of the remaining three terms.at n=19A250329