References to A130120

a(0)=1. a(n) = number of earlier terms of the sequence which divide n(n+1)/2.
1, 1, 2, 3, 3, 4, 4, 5, 7, 5, 4, 5, 5, 3, 10, 14, 6, 5, 5, 10, 17, 6, 2, 12, 21, 8, 5, 12, 6, 12

1 seqfan posts