41CL Quiz: Determinant of 30x30 anti-Identity matrix

[Gerson W. Barbosa]

(06-05-2018 01:40 PM)Ángel Martin Wrote:  40, XEQ "DDN" = (.. and 79.6 seconds later ...)=> 1.439439902 E50

On my HP 50g, in Exact mode:

40

« → n
  « '(n+1)!*((COMB((n+2)!+n+1,n+1)-1)/(n+2)!-(n+2)*FLOOR((COMB((n+2)!+n+1,n+1)-1)/((n+2)*(n+2)!)))' EVAL
  »
»

TEVAL

->

143943990158833766399457315931645601623572480000000

s: 54.2999

But for a moment I'd forgotten about the KISS principle:

40

« 1 + ! 0 1 LASTARG
  FOR i i INV +
  NEXT * EXPAND
»
TEVAL

->

143943990158833766399457315931645601623572480000000

s: 3.1465