[seqfan] MOA-Pi(n)

zbi74583.boat at orange.zero.jp zbi74583.boat at orange.zero.jp
Thu Oct 23 04:57:42 CEST 2014


    Hi,Seqfans

    MOA-Pi(n) is an abbreviation of Minimal Ordinal Amicable Number whose the
smallest prime factor is Pi(n)
    The sequence of MOA-Pi(n) is the following

    220,12285,42262694537514864075544955198125,5886188086733439782543275982434512191053242121061614852194076089917945892521796133874953922317186513706331426376543578708245196142712524487266825790283722236478446468599374184773242004785197367
    284,14595,42405817271188606697466971841875,5952325031528197532908930768754001092076312315921614993540183426574105120183864443754249193548505372527353334648762876621278913661858681092794166628706450373701855015169772679216313195214802633

    Third term and fourth term are the smallest known, I found the fourth one in
1997.
    The smallest prime factor of four terms are 2,3,5,7 and they have 3,5,32,193
digits



    MIA,MUA,MSUA, are abbreviations of Minimal Infinitary Amicable and Minimal
Unitary Amicable and Minimal Super Unitary Amicable

    MIA-Pi(n)
    114,12285
    126,14595

    MUA-Pi(n)
    114,8619765
    126,9627915

    MSUA-Pi(n)
    110,33,455
    142,35,601

    Do anyone know the next terms of these sequence?



    Yasutoshi





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