24557

Appears in sequences

• Numbers k such that 7*2^k - 1 is prime.at n=10A001771
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 10.at n=32A031423
• a(n) = A077710(n+1)/A077710(n).at n=17A077711
• Write exp(-x) = Product_{n>=1} (1 + g_n * x^n); a(n) = numerator(g_n).at n=17A170910
• a(n) is the number of quadruples (a_1, a_2, a_3, a_4) having all terms in {1,...,n} such that there exists a quadrilateral with these side lengths.at n=13A346636
• a(n) is the number of different hooklength lists of the plane partitions of n.at n=21A381332