19678

Appears in sequences

• a(n) = [ a(n-1)/a(1) + a(n-2)/a(2) + ... + a(1)/a(n-1) ], for n >= 3.at n=24A022875
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 76 ones.at n=32A031844
• Indices of primes in sequence defined by A(0) = 31, A(n) = 10*A(n-1) + 81 for n > 0.at n=10A101848
• a(n) = 3^n - 5.at n=9A168613
• Monotonic ordering of nonnegative differences 3^i-5^j, for 40>= i>=0, j>=0.at n=34A192149
• Number of partitions of n containing m(5) as a part, where m denotes multiplicity.at n=43A240490
• Number of shapes of left-leaning height-balanced AVL trees with n (inner) nodes.at n=33A296103
• A divisor analog of the Motzkin numbers A001006.at n=14A297438
• Number of ordered ways of writing the n-th n-gonal pyramidal number as a sum of n n-gonal pyramidal numbers (with 0's allowed).at n=8A336091
• Records in A347113.at n=17A347307
• Expansion of Sum_{k>0} x^(2*k)/(1+x^k)^6.at n=17A363614