A130121 a(1)=1. a(n) = number of earlier terms of the sequence which divide n(n+1)/2.

1, 1, 2, 3, 3, 4, 4, 7, 4, 2, 6, 7, 4, 6, 12, 8, 4, 4, 4, 10, 6, 2, 18, 19, 2, 4, 14, 9, 4, 4, 17, 23, 5, 6, 19, 14, 4, 6, 27, 19, 6, 6, 6, 20, 7, 3, 30, 35, 7, 7, 18, 6, 7, 8, 29, 41, 9, 3, 22, 22, 2, 14, 47, 23, 7, 6, 8, 24, 17, 11, 37, 37, 4, 9, 27, 23, 14, 6, 25, 50, 12, 3, 34, 41, 5, 8, 41