1,2

16447*sigma(16447)*sigma(sigma(16447))=T(4210431).

Cf. A116004.

Sequence in context: A073562 A121958 A054746 this_sequence A006737 A128869 A140606

Adjacent sequences: A116002 A116003 A116004 this_sequence A116006 A116007 A116008

nonn

Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 13 2006