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A200049 Positions of squares of odd primes among odd powerful numbers A062739. 1
2, 3, 5, 7, 9, 12, 14, 16, 20, 21, 27, 29, 30, 34, 37, 44, 45, 48, 52, 53, 58, 61, 65, 71, 75, 76, 78, 79, 84, 93, 97, 100, 101, 109, 111, 115, 119, 122, 128, 132, 133, 142, 144, 146, 147, 157, 165, 169, 170, 172, 178, 180, 188, 193, 198, 202, 203, 207, 211, 213, 221, 231, 233, 234, 238, 251, 254, 261, 263, 267, 271 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Zak Seidov, Table of n, a(n) for n = 1..1000

FORMULA

A062739(a(n)) = (A000040(n+1))^2.

PROG

(PARI) lista(nn) = select(x->(issquare(x) && isprime(sqrtint(x))), select(x->(ispowerful(x) && (x % 2)), vector(nn, k, k)), 1); \\ Michel Marcus, Jun 18 2017

CROSSREFS

Cf. A000040, A062739.

Sequence in context: A254440 A284914 A293262 * A279984 A184017 A024195

Adjacent sequences:  A200046 A200047 A200048 * A200050 A200051 A200052

KEYWORD

nonn

AUTHOR

Zak Seidov, Nov 13 2011

STATUS

approved

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Last modified December 3 20:28 EST 2020. Contains 338919 sequences. (Running on oeis4.)