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A096855 a(n)=A062401(2^n + 1). 3
2, 2, 12, 6, 16, 24, 80, 84, 320, 360, 864, 1320, 5456, 5184, 15744, 19800, 52800, 69120, 349520, 370080, 1036800, 1425600, 3640896, 4741632, 13989888, 27091584, 76743040, 94656000, 166387200, 412473600, 1407389952, 1420488192, 3459760128 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..33.

MATHEMATICA

Table[ EulerPhi[ DivisorSigma[1, 1+2^w]], {w, 33}]

CROSSREFS

Cf. A062401, A062402, A053287, A096853, A096854, A096855, A096856.

Sequence in context: A013605 A073768 A278534 * A256120 A024538 A279879

Adjacent sequences:  A096852 A096853 A096854 * A096856 A096857 A096858

KEYWORD

nonn

AUTHOR

Labos Elemer, Jul 19 2004

EXTENSIONS

Edited and extended by Robert G. Wilson v, Jul 23 2004

STATUS

approved

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Last modified August 7 11:56 EDT 2020. Contains 336276 sequences. (Running on oeis4.)