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A085255 Numbers having a at least two representations as sum of two powerful numbers (A001694). 4
17, 33, 36, 40, 41, 50, 52, 57, 65, 68, 72, 73, 76, 80, 81, 85, 89, 97, 104, 108, 109, 113, 116, 117, 125, 129, 130, 132, 133, 136, 137, 144, 145, 148, 152, 153, 157, 160, 164, 170, 172, 177, 180, 185, 189, 193, 197, 200, 201, 204, 205, 208, 209, 216, 221 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A085252(a(n))>1.

LINKS

Table of n, a(n) for n=1..55.

Eric Weisstein's World of Mathematics, Powerful Number

CROSSREFS

Cf. A085254, A076871, A085253.

Sequence in context: A162624 A029817 A162504 * A283395 A244752 A138393

Adjacent sequences:  A085252 A085253 A085254 * A085256 A085257 A085258

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jun 23 2003

STATUS

approved

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Last modified December 10 04:15 EST 2019. Contains 329885 sequences. (Running on oeis4.)