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A096856 a(n)=A062402[1+2^n]. 3
3, 7, 12, 31, 42, 124, 224, 511, 847, 1953, 2688, 12264, 18816, 29127, 72540, 131071, 195048, 558523, 1077440, 3164112, 4552020, 10890040, 10342080, 54525848, 73260781, 155671040, 318848400, 1080311232, 964580240, 3070642080 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..30.

MATHEMATICA

Table[DivisorSigma[1, EulerPhi[1+2^w]], {w, 1, 30}]

CROSSREFS

Cf. A062401, A062402, A053287, A096853-A096855.

Sequence in context: A047068 A167490 A081533 * A108154 A010260 A258136

Adjacent sequences:  A096853 A096854 A096855 * A096857 A096858 A096859

KEYWORD

nonn

AUTHOR

Labos Elemer, Jul 19 2004

STATUS

approved

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Last modified March 4 02:14 EST 2021. Contains 341773 sequences. (Running on oeis4.)