31979

Appears in sequences

• Numbers that are the sum of 3 nonzero 6th powers.at n=32A003359
• Numbers n such that n and its reversal are distinct brilliant numbers (A078972).at n=34A097435
• a(n) = n*(n^2 - 1)/2 - 1.at n=38A117560
• Number of kites, distinct up to congruence, on an n X n grid (or geoboard).at n=44A181946
• Numbers n such that m=(n^2+1)/2, p=(m^2+1)/2 and q=(p^2+1)/2 are all prime.at n=19A188546
• a(1)=1; a(n) = floor((3 + sqrt(21))*a(n-1)/2) for n > 1.at n=8A196472
• Indices of the primes of |A007442|.at n=23A359629
• Semiprimes that are (perimeter^2 - hypotenuse^2) of a Pythagorean triple.at n=4A389589