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A073800 Remainder of division 2^n/c[n], where c[n]=A002808, the n-th composite. 1
2, 4, 0, 7, 2, 4, 2, 1, 0, 16, 8, 1, 8, 16, 18, 16, 14, 8, 8, 0, 2, 30, 18, 28, 14, 4, 8, 16, 28, 19, 6, 16, 29, 34, 8, 40, 2, 14, 8, 16, 14, 4, 8, 4, 0, 49, 62, 52, 32, 4, 8, 46, 17, 20, 65, 22, 32, 16, 62, 64, 32, 64, 41, 16, 32, 64, 48, 70, 48, 24, 32, 22, 74, 84, 8, 16, 32, 52 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..78.

MATHEMATICA

Table[Mod[2^j, FixedPoint[j+PrimePi[ # ]+1&, j]], {j, 1, 128}]

Module[{c=Select[Range[200], CompositeQ], len}, len=Length[c]; Table[ PowerMod[ 2, n, c[[n]]], {n, len}]] (* Harvey P. Dale, Mar 03 2018 *)

CROSSREFS

Cf. A000079, A002808, A015910, A062173, A064367, A073797-A073799.

Sequence in context: A344031 A229534 A021810 * A076813 A049289 A258053

Adjacent sequences:  A073797 A073798 A073799 * A073801 A073802 A073803

KEYWORD

nonn

AUTHOR

Labos Elemer, Aug 12 2002

STATUS

approved

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Last modified October 16 19:39 EDT 2021. Contains 348044 sequences. (Running on oeis4.)