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A115900 Numbers n such that n+sigma(n) and n+phi(n) are palindromes. 0
1, 2, 3, 4, 5, 219, 322, 375, 22248, 32065, 47827, 1406744, 2144055, 2991368, 3626587, 4909369, 172133971, 177457001, 328030055, 3128669654, 8345867631, 19649249526, 45179367929, 47228405729, 48534773039, 49583585599, 2127577449846, 2191781701563, 3972961263797 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Intersection of A115895 and A115896.

a(27) > 10^11. 3972961263797 is also a term. - Donovan Johnson, May 31 2013

a(30) > 10^13. - Giovanni Resta, Jun 05 2013

LINKS

Table of n, a(n) for n=1..29.

EXAMPLE

4909369+sigma(4909369)=9823289 and 4909369+phi(4909369)=9814189.

CROSSREFS

Cf. A115895, A115896.

Sequence in context: A073787 A274028 A037436 * A010347 A004878 A062942

Adjacent sequences:  A115897 A115898 A115899 * A115901 A115902 A115903

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Feb 06 2006

EXTENSIONS

a(17)-a(26) from Donovan Johnson, Oct 05 2010

a(27)-a(29) from Giovanni Resta, Jun 05 2013

STATUS

approved

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Last modified December 4 04:22 EST 2020. Contains 338921 sequences. (Running on oeis4.)