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A066162
Let p be a prime of the form 4k-1; sequence gives (q!^2-1)/p where q = (p-1)/2.
0
0, 5, 1309, 6930626021, 69276127053913, 55161685571748368516129, 60704287720766467657420739188688372093, 14219718499310404733294067750922248714893617, 1325029748371862191613733461029305453409268582295864406779661
OFFSET
1,2
FORMULA
a(n) = (q!^2-1)/p where q=(p-1)/2 and p = A002145(n). - Sean A. Irvine, Oct 02 2023
CROSSREFS
Cf. A002145.
Sequence in context: A069642 A182345 A268485 * A096725 A332536 A172920
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Dec 13 2001
EXTENSIONS
Missing a(1)=0 inserted by Sean A. Irvine, Oct 02 2023
STATUS
approved