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A062732 Squares arising in A039770. 6
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 A024727 A024552

Adjacent sequences:  A062729 A062730 A062731 * A062733 A062734 A062735

KEYWORD

nonn

AUTHOR

Jason Earls, Jul 12 2001

STATUS

approved

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Last modified January 20 02:29 EST 2018. Contains 297938 sequences.