@article{02186910, title = {Prime and composite terms in Sloane's sequence A056542.}, journal = {Journal of Integer Sequences [electronic only]}, volume = {8}, year = {2005}, zbl = {1096.11507}, language = {en}, url = {http://dml.mathdoc.fr/item/02186910} }
Müller, Tom. Prime and composite terms in Sloane's sequence A056542.. Journal of Integer Sequences [electronic only], Tome 8 (2005) . http://gdmltest.u-ga.fr/item/02186910/