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A115897 Numbers n such that sigma(n)+phi(n) is a palindrome. 4
1, 2, 3, 4, 10, 11, 21, 49, 92, 101, 115, 131, 145, 186, 200, 201, 206, 207, 221, 226, 227, 240, 272, 302, 310, 313, 327, 342, 344, 370, 374, 388, 403, 406, 409, 413, 419, 425, 439, 449, 880, 948, 1015, 1055, 1132, 1165, 1385, 1443, 1680, 1755, 1785 (list; graph; refs; listen; history; internal format)
OFFSET

1,2

EXAMPLE

sigma(1055)+phi(1055)=1272+840=2112.

CROSSREFS

Cf. A115895, A115896.

Sequence in context: A202426 A039002 A120023 * A116019 A087460 A082866

Adjacent sequences:  A115894 A115895 A115896 * A115898 A115899 A115900

KEYWORD

nonn,base

AUTHOR

Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 06 2006

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Last modified February 17 06:13 EST 2012. Contains 205991 sequences.