28232

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 42.at n=7A031720
• Number of fullerenes with 2n vertices (or carbon atoms), counting enantiomorphic pairs as distinct.at n=27A057210
• Numbers n such that A118799(n) = 0.at n=12A118578
• Number of n X n arrays of squares of integers summing to 29 with every element equal to at least one neighbor.at n=2A146530
• a(n) = 64*n^2 + 8.at n=20A158488
• Polynomial expansion of p(x)=1/(1 - 3 x + 2 x^2 + 2 x^3 - 4 x^4 + 4 x^5 - 2 x^6 - 2 x^7 + 3 x^8 - x^9 - x^17 + 3 x^18 - 2 x^19 - 2 x^20 + 4 x^21 - 4 x^22 + 2 x^23 + 2 x^24 - 3 x^25 + x^26).at n=42A164787
• Expansion of Product_{k>=1} (1 + k*x^(k^2))^k.at n=54A285242
• a(n) is the determinant of the 2 X 2 matrix whose entries (when read by rows) are the n-th primes congruent to 1, 3, 5, 7 mod 8 respectively.at n=12A337145
• G.f. A(x) satisfies: A(x) = 1 + x * A(x)^3 / (1 - 4 * x).at n=6A349532