24961

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 89.at n=26A020428
• Cube root of A030683.at n=34A030684
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 12.at n=23A031600
• Row 4 of square array defined in A047671.at n=12A047673
• Brilliant star numbers: semiprimes of the form 6n^2 - 6n + 1 such that both prime factors have the same number of decimal digits.at n=9A083749
• Composite numbers such that all divisors >1 have the same number of 1's in binary representation.at n=40A089042
• G.f. satisfies: A(x) = (1 + x*A(2x))^4.at n=4A171203
• Centered 32-gonal numbers.at n=39A195315
• Number of 2 X 2 matrices having all terms in {1,...,n} and positive determinant.at n=14A211059
• Centered 12-gonal numbers which are semiprimes, intersection of A003154 and A001358.at n=28A218172
• Minimum value of the cyclic autocorrelation of first n primes.at n=22A299053
• a(n) = Sum_{k=1..n} (-2)^(n - floor(n/k)).at n=12A345109
• Integers k such that k^2 can be written as the sum of three positive fourth powers.at n=7A365657
• Primitive solutions k to k^2 = u^4 + v^4 + w^4, with u, v, w > 0.at n=1A365688