24931

Appears in sequences

• Expansion of 1/((1+x)*(sqrt(1-4*x^2)-x)).at n=14A116391
• Odd integers k such that for every m >= 1 the numbers k*4^m - 1 have at least three prime factors, not necessarily distinct, and k*4^m - 1 has at least two-element covering set.at n=37A233552
• Number of (4+2) X (n+2) 0..3 arrays with every 3 X 3 subblock row and diagonal sum equal to 0 3 5 6 or 7 and every 3 X 3 column and antidiagonal sum not equal to 0 3 5 6 or 7.at n=14A252388
• Numbers k such that there is no prime p and index j < k such that A002182(k) = p * A002182(j).at n=7A272606
• Number of minimal dominating sets in the n-dipyramidal graph (for n > 3).at n=29A347638
• Numbers k such that A353802(k) / sigma(sigma(k)) is an integer > 1, where A353802(n) = Product_{p^e||n} sigma(sigma(p^e)).at n=15A353807
• Smallest semiprime p1*p2 such that p2 mod p1 = n and no prime is used more than once in the sequence.at n=18A386256