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A062732 Squares arising in A039770. 10
1, 1, 4, 4, 4, 4, 16, 16, 16, 36, 16, 16, 36, 16, 36, 36, 36, 64, 100, 36, 36, 100, 36, 64, 64, 64, 64, 144, 64, 196, 100, 64, 144, 64, 100, 256, 144, 144, 144, 144, 144, 144, 144, 144, 144, 196, 400, 144, 144, 144, 400, 144, 144, 324, 144, 400, 256, 324, 256, 144 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

REFERENCES

D. M. Burton, Elementary Number Theory, Allyn and Bacon Inc., Boston MA, 1976, p. 141.

LINKS

Harry J. Smith, Table of n, a(n) for n = 1..1000

PROG

(PARI) je=[]; for(n=1, 1000, if(issquare(eulerphi(n)), je=concat(je, eulerphi(n)))); je

(PARI) n=0; for (m=1, 10^5, if (issquare(a=eulerphi(m)), write("b062732.txt", n++, " ", a); if (n==1000, break))) \\ Harry J. Smith, Aug 10 2009

CROSSREFS

Cf. A039770.

Sequence in context: A132383 A115639 A242954 * A100777 A309501 A024727

Adjacent sequences:  A062729 A062730 A062731 * A062733 A062734 A062735

KEYWORD

nonn

AUTHOR

Jason Earls, Jul 12 2001

STATUS

approved

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Last modified August 25 13:50 EDT 2019. Contains 326324 sequences. (Running on oeis4.)