28939

Appears in sequences

• Strong pseudoprimes to base 55.at n=14A020281
• Strong pseudoprimes to base 73.at n=15A020299
• Sum of the digits of the n-th Mersenne prime (A000668).at n=24A066538
• Records in A007535.at n=37A098654
• a(n) = 1 + n + ((n-1)*n^2)/2.at n=39A218152
• Number of partitions p of n such that (number of numbers in p of form 3k+1) > (number of numbers in p of form 3k+2).at n=43A241739
• Odd numbers k such that A064989(k) is in A340151.at n=38A340091
• a(n) = 2 + n^2*floor((n+3)/2) + floor(3*n/2).at n=37A370754