18050

Appears in sequences

• Numerators of continued fraction convergents to sqrt(110).at n=4A041198
• Numbers k such that k-1, k-3, k-7 and k-9 are all prime.at n=16A064974
• The smallest number which when multiplied by the n-th repunit gives a Smith number.at n=51A176385
• Total number of parts of multiplicity 9 in all partitions of n.at n=44A222709
• G.f.: Sum_{n>=0} x^n * Product_{k=1..n} (1 - x^(n+k))/(1 - x^k).at n=39A260894
• Number of nX2 0..1 arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.at n=11A267638
• Numbers k such that k and k^2 are the sums of two nonzero squares in exactly two ways.at n=34A273293
• Difference between the multiplicative orders of 2 modulo p^2 and 2 modulo p, where p = prime(n).at n=41A282552
• Records of A058249: (Smallest prime >= 2^n) - (largest prime <= 2^n).at n=37A331620
• Consider all the Pythagorean triangles with perimeter A010814(n). Then a(n) is the sum of the areas of the squares on all of their sides.at n=38A334808
• Numbers k for which A327500(k) <> A351946(k).at n=35A351947
• Numbers k such that A372720(k) = 0.at n=40A372864
• Even numbers whose sum of proper (or aliquot) divisors is a prime.at n=43A377766