A332554 a(n) = (n*(n+1)/2)/Q(n) - (Q(n)+1)/2, where Q(n) = A332547(n).

2, 5, 9, 3, 5, 27, 10, 6, 8, 20, 24, 9, 11, 21, 135, 12, 14, 35, 6, 15, 17, 90, 12, 18, 20, 7, 54, 21, 23, 495, 42, 24, 26, 19, 69, 27, 29, 44, 161, 30, 32, 80, 13, 33, 35, 374, 45, 17, 38, 14, 99, 39, 10, 26, 65, 42, 44, 110, 114, 45, 47, 85, 153, 11

Offset: 2

Author

N. J. A. Sloane, Feb 21 2020, following a suggestion from Michael J. Collins, Feb 19 2020

Keywords

• nonn

Comments

Michael J. Collins showed that this is an upper bound on A082183 (see Comments in A082183).