28564

Appears in sequences

• Expansion of 1/Product_{m>=1} (1 - m*q^m)^2.at n=12A022726
• Convolution of natural numbers n >= 1 with Fibonacci numbers F(k), k >= 4.at n=15A033960
• Numerators of continued fraction convergents to sqrt(583).at n=5A042116
• a(n) = Sum_{k=1..n} T(n,k), array T as in A049790.at n=43A049791
• 1/5 the number of colorings of an n X n square array with 5 colors.at n=2A068255
• Numbers n such that n + sum of prime factors of n = (n+1) + sum of prime factors of (n+1).at n=27A075654
• a(n) = smallest multiple of prime(n) such that a(n) +1 is a multiple of prime(n+1).at n=43A077338
• Appearance radii of visible vectors in the medial axis test mask for the Euclidean distance in Z^2.at n=23A171988
• Number of n X 3 0..4 arrays with no entry increasing mod 5 by 4 rightwards or downwards, starting with upper left zero.at n=2A222139
• T(n,k) = number of n X k 0..4 arrays with no entry increasing mod 5 by 4 rightwards or downwards, starting with upper left zero.at n=12A222144
• Numbers k such that phi(k) and phi(k+1) are perfect powers (A001597).at n=49A332008
• Indices of 0 in A348295: numbers m such that Sum_{k=1..m} (-1)^(floor(k*(sqrt(2)-1))) = Sum_{k=1..m} (-1)^A097508(k) = 0.at n=43A348299