A101085 Diagonal below the main diagonal of A083796, i.e., a(n) = A083796(n, n-1).

2, 2, 5, 4, 8, 6, 11, 8, 24, 10, 17, 12, 20, 14, 135, 16, 26, 18, 29, 20, 252, 22, 35, 24, 90, 26, 153, 28, 44, 30, 47, 32, 594, 34, 665, 36, 56, 38, 819, 40, 62, 42, 65, 44, 1080, 46, 71, 48, 224, 50, 1377, 52, 80, 54, 1595, 56, 1710, 58, 89, 60, 92, 62, 2079, 64, 2210, 66

Offset: 2

Author

David Wasserman, Nov 30 2004

Keywords

• easy
• nonn
• less

Comments

a(n) is the least k such that 1) n divides k + (n-1)(n-2)/2; 2) k > n-2; 3) A048671(n-1) divides k.

Crossrefs

Cf. A048671, A083796, A083797.