A075131 Picture-perfect numbers of form 57*p for p in A075130. The decimal reversal is equal to the sum of the reversed proper divisors.

7980062073, 79862699373, 798006269373, 7986207926373, 79862079269373, 798062073062073, 798620736269373, 7980000620792073, 7980006269999373, 7980620730626373, 7980626373062073, 7980626379269373, 7986207306269373

Offset

1,1

Comments

All known picture-perfect numbers are of this form, except the first 4 in A069942. - Jens Kruse Andersen, May 06 2008

Links

Table of n, a(n) for n=1..13.

Discussion forum, Systematic Undertaking to Find Picture-Perfect Numbers

Joseph Pe, Picture-Perfect Numbers and Other Digit-Reversal Diversions

Example

a(4)=57*140108910989=7986207926373.

Crossrefs

a(n) = 57*A075130(n)

Cf. A075130, A069942.

Sequence in context: A288090 A306828 A364436 * A250865 A108880 A204500

Adjacent sequences: A075128 A075129 A075130 * A075132 A075133 A075134

Keyword

base,nonn

Author

Jens Kruse Andersen, Sep 04 2002

Extensions

Edited by Jens Kruse Andersen, May 06 2008

Status

approved