70340

Appears in sequences

• Number of bifix-free (or primary, or unbordered) words of length n over a two-letter alphabet.at n=18A003000
• Triangle read by rows of numbers of permutations eliminating just card k out of n in game of Mousetrap.at n=50A028306
• Number of binary words of length n (beginning with 0) whose autocorrelation function is the indicator of a singleton.at n=18A045690
• a(n)/4^n is the measure of the subset of [0,1] remaining when all intervals of the form [b/2^m - 1/2^(2m), b/2^m + 1/2^(2m)] have been removed, with b and m positive integers, b < 2^m and m <= n.at n=9A107284
• Number of irredundant sets in the n-web graph.at n=6A290591
• Numbers k for which k = phi(k') + phi(k''), where phi is the Euler totient function (A000010), k' the arithmetic derivative of k (A003415) and k'' the second arithmetic derivative of k (A068346).at n=22A352332