28581

Appears in sequences

• Convolution of (F(2), F(3), F(4), ...) and odd numbers.at n=16A023652
• Numbers n such that 87*2^n-1 is prime.at n=39A050569
• Number of n X n binary arrays with all ones connected only in a 1000-1110-0111-0001 pattern in any orientation.at n=8A147397
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1110-0111-0001 pattern in any orientation.at n=18A147399
• Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1000-1110-0111-0001 pattern in any orientation.at n=19A147399
• a(n) = Sum_{d|n} (sigma(d)*pod(d)) where sigma(k) = the sum of the divisors of k (A000203) and pod(k) = the product of the divisors of k (A007955).at n=25A325029