30808

Appears in sequences

• Discriminants of totally complex sextic fields (negated).at n=28A023687
• Sum of first n 8-almost primes.at n=20A086061
• Column 1 and row sums of triangle A130580.at n=13A130581
• Pascal-(1,8,1) array.at n=58A143683
• Pascal-(1,8,1) array.at n=62A143683
• Number of nX4 0..1 arrays with no element equal to more than two of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=6A281076
• Number of nX7 0..1 arrays with no element equal to more than two of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=3A281079
• T(n,k) = Number of n X k 0..1 arrays with no element equal to more than two of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=48A281080
• T(n,k) = Number of n X k 0..1 arrays with no element equal to more than two of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.at n=51A281080
• A331776(n)/4.at n=19A332594
• a(n) = number of partitions of n whose difference multiset has at least one duplicate; see Comments.at n=39A364612
• Numbers t which satisfy the equation: t mod k = floor((t - k)/k) mod k (1 <= k <= t) only for k = 1 and t.at n=30A375007