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A178556 Primes with exactly seven 7's. 5
77767777, 77777177, 77777377, 77777747, 137777777, 172777777, 177677777, 177776777, 177777377, 177777577, 177777727, 177777773, 177777779, 177797777, 197777777, 272777777, 277177777, 277727777, 277771777, 277775777, 277777177 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..21.

CROSSREFS

Cf. A038618, A178550-5, A178557-8

Sequence in context: A295479 A203825 A109178 * A251174 A053431 A179578

Adjacent sequences:  A178553 A178554 A178555 * A178557 A178558 A178559

KEYWORD

nonn,base

AUTHOR

Lekraj Beedassy, May 29 2010

STATUS

approved

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Last modified September 23 02:41 EDT 2021. Contains 347609 sequences. (Running on oeis4.)