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A125763 Numbers k such that k^2 is a term of A120329. 0
1, 2, 3, 20, 103 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
a(n)^2 = {1, 4, 9, 400, 10609, ...} are the perfect squares in A120329 and A121166. A120329 = {1, 4, 6, 9, 10, 12, 22, 45, 400, 417, 561, 620, ...} Nonprime integers n such that n divides A120492(n). A121166 = {1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 13, 17, 19, 22, 23, 29, 31, ...} Integers n such that n divides A120492[n] = 1 + Sum[ Prime[k]^(n-1), {k,1,n}].
LINKS
CROSSREFS
Sequence in context: A267652 A258089 A165960 * A042441 A128977 A069323
KEYWORD
hard,more,nonn
AUTHOR
Alexander Adamchuk, Feb 03 2007
STATUS
approved

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Last modified February 28 08:11 EST 2024. Contains 370393 sequences. (Running on oeis4.)