1,1

Eric Weisstein's World of Mathematics, Sociable Numbers

Cf. A090615.

Adjacent sequences: A119475 A119476 A119477 this_sequence A119479 A119480 A119481

Sequence in context: A003803 A068243 A034656 this_sequence A101816 A129250 A121841

nonn,more

Eric Weisstein (eric(AT)weisstein.com), May 22, 2006

a(4)-a(5) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Sep 03 2008