1047540

Appears in sequences

• Number of aperiodic binary strings of length n; also number of binary sequences with primitive period n.at n=20A027375
• Row sums of triangle T(m,n) = number of solutions to 1 <= a(1) < a(2) < ... < a(m) <= n, where gcd(a(1), a(2), ..., a(m), n) = 1, in A020921.at n=19A038199
• Number of 4-ary sequences with primitive period n.at n=10A054719
• Number of primitive (aperiodic) words of length n which contain exactly two different symbols.at n=19A056267
• Number of primitive (aperiodic) palindromes using a maximum of two different symbols.at n=39A056458
• Number of primitive (aperiodic) palindromes using a maximum of four different symbols.at n=19A056460
• Number of primitive (aperiodic) palindromes using exactly two different symbols.at n=39A056463
• a(n) = AP(n) is the total number of aperiodic k-palindromes of n, 1 <= k <= n.at n=39A179781
• Number of length 10 primitive (=aperiodic or period 10) n-ary words.at n=4A218133
• Number of 3 X n binary matrices that are "primitive"; that is, they cannot be expressed as a "tiling" by a smaller matrix.at n=4A290754
• Number of 4 X n binary matrices that are "primitive"; that is, they cannot be expressed as a "tiling" by a smaller matrix.at n=3A291070
• Table read by antidiagonals where A(n,k) is the number of n X k aperiodic binary arrays.at n=31A323860
• Table read by antidiagonals where A(n,k) is the number of n X k aperiodic binary arrays.at n=32A323860
• Table read by antidiagonals where A(n,k) is the number of n X k binary arrays in which both the sequence of rows and the sequence of columns are (independently) aperiodic.at n=31A323862
• Table read by antidiagonals where A(n,k) is the number of n X k binary arrays in which both the sequence of rows and the sequence of columns are (independently) aperiodic.at n=32A323862