41645

Appears in sequences

• 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 14.at n=29A031602
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 14.at n=30A031692
• Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1000-1111-0001-0001 pattern in any orientation.at n=13A147396
• a(n) is the number of free convex polyominoes of n cells.at n=13A359661
• Semiprimes k such that k+2 and k+6 are primes and k+4 and k+8 are all semiprimes.at n=18A392186