diff options
| -rw-r--r-- | org-fc-algo-tn.el | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/org-fc-algo-tn.el b/org-fc-algo-tn.el index 9b547d4..90b5419 100644 --- a/org-fc-algo-tn.el +++ b/org-fc-algo-tn.el @@ -4,9 +4,9 @@ (defun nth-tn (n) "The mathematical formula for the Nth triangular number." - (- (/ (* n (1+ n)) - 2) - 0.5)) + (if (zerop n) + 0 + (/ (* n (1+ n)) 4.0))) (defun org-fc-algo-tn-next-parameters (ease box interval rating) "Calculate the next parameters of a card, based on the review RATING. |