23960

Appears in sequences

• Related to representation as sums of squares.at n=25A002292
• a(0) = 1, a(n) = 22*n^2 + 2 for n>0.at n=33A010012
• Denominators of continued fraction convergents to sqrt(897).at n=7A042735
• a(n) = 8000*n - 40.at n=2A157660
• Expansion of 1/(2*f(x)) - 1/(4 - 2*g(x)), where f(x) = sqrt(1 - 4*x) and g(x) = sqrt(1 + 4*x).at n=9A268601
• a(n) is the forgotten index of the Lucas cube Lambda(n).at n=9A307307
• Index of first occurrence of n in A305382.at n=23A316226
• Numbers m such that m^2+1 is prime with (m-1)^2+1 and (m+1)^2+1 semiprimes.at n=37A321795
• Number of integer partitions of n such that every pair of distinct parts has a different product.at n=39A325856
• a(n) = Sum_{k=0..n} (-3)^(n-k) * binomial(2*n+1,k).at n=9A387085