25624

Appears in sequences

• Numbers k such that 5*2^k - 1 is prime.at n=31A001770
• a(1) = 7; a(n+1) = a(n)-th composite.at n=39A025011
• Sum{T(n-k,k)}, 0<=k<=[ n/2 ], T given by A026681.at n=19A026691
• Numbers k such that the decimal part of k^(1/6) starts with a 'nine digits' anagram.at n=10A034281
• Numbers k such that k^14 == 1 (mod 15^3).at n=30A056087
• Cubeful numbers whose neighbors are also cubeful.at n=12A122692
• Table of triangular arguments such that if A002262(14*k) = "r" then the product A182431(k,i + 1) * A182431(k,i + 2) equals "r" + A000217(a(k,i)).at n=29A182102
• Number of 5Xn 0..1 arrays with diagonals and rows unimodal and antidiagonals nondecreasing.at n=7A224161
• Sum of cubes of proper divisors of n.at n=55A276634
• a(n) is obtained by applying the map k -> composite(k) n times, starting at n.at n=35A280327
• Number of n X 2 0..2 arrays with no element equal to more than one of its king-move neighbors and with new values introduced in order 0 sequentially upwards.at n=7A280853
• T(n,k)=Number of nXk 0..2 arrays with no element equal to more than one of its king-move neighbors and with new values introduced in order 0 sequentially upwards.at n=37A280859
• T(n,k)=Number of nXk 0..2 arrays with no element equal to more than one of its king-move neighbors and with new values introduced in order 0 sequentially upwards.at n=43A280859
• T(n,k)=Number of nXk 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.at n=37A281605
• Least number k such that the determinant of the symmetric Toeplitz matrix formed by its decimal digits is equal to n.at n=38A307887
• Number of triangular regions into which a figure made up of a row of n adjacent congruent rectangles is divided upon drawing diagonals of all possible rectangles.at n=22A324042