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A368368
AGM transform of squares.
2
0, 9, 1772, 662544, 458284375, 543682781641, 1033215730131200, 2972173255049281536, 12354182867688591966525, 71417932095699615712890625, 556289577698910589026958125056, 5685963330436142993425055664640000, 74579993174727714813743424870936891459
OFFSET
1,2
COMMENTS
See A368366 for further information.
LINKS
MATHEMATICA
A368368[n_] := (n*(n+1)*(2*n+1)/6)^n - n^n*n!^2;
Array[A368368, 15] (* Paolo Xausa, Jan 29 2024 *)
PROG
(Python)
from math import factorial
def A368368(n): return (n*(n+1)*((n<<1)+1)//6)**n-n**n*factorial(n)**2 # Chai Wah Wu, Jan 25 2024
CROSSREFS
Cf. A368366.
Sequence in context: A251700 A246115 A068182 * A218415 A194135 A114224
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jan 24 2024
STATUS
approved