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A177963 a(n) = ((prime(n) - 3)!)^2. 1
1, 4, 576, 1625702400, 13168189440000, 7600054456551997440000, 437763136697395052544000000, 5919012181389927685417441689600000000, 162644002617632464507038883409628607021056000000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET
2,2
COMMENTS
Except for the first three terms, sqrt(a(n)/400) is an integer. For all terms a(n), sqrt(a(n+1)/a(n)) is an integer.
LINKS
Nathaniel Johnston, Table of n, a(n) for n = 2..50
MAPLE
A177963 := proc(n) return factorial(ithprime(n)-3)^2: end: seq(A177963(n), n=2..10); # Nathaniel Johnston, May 28 2011
MATHEMATICA
((Prime[Range[2, 10]]-3)!)^2 (* Harvey P. Dale, Jun 28 2023 *)
CROSSREFS
Cf. A177926.
Sequence in context: A177926 A241095 A343474 * A102201 A102204 A086143
KEYWORD
nonn,easy
AUTHOR
Giovanni Teofilatto, May 16 2010
EXTENSIONS
Offset corrected by Nathaniel Johnston, May 28 2011
STATUS
approved

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Last modified June 23 10:04 EDT 2024. Contains 373629 sequences. (Running on oeis4.)