a(n) = floor(X/Y) where X = concatenation of first n odd numbers in increasing order and Y = n-th triangular number.

A067120

a(n) = floor(X/Y) where X = concatenation of first n odd numbers in increasing order and Y = n-th triangular number.

Terms

    a(0) =1a(1) =4a(2) =22a(3) =135a(4) =905a(5) =64662a(6) =4849682a(7) =377197536a(8) =30175802922

External references