Hello everybody, I made this simple test : http://www.google.fr/search?num=100&hl=fr&safe=off&tbo=1&tbs=bks%3A1&q=%22encyclopedia+of+integer+sequences%22&aq=f&aqi=&aql=&oq=&gs_rfai= how many citations are there in books of the EIS and OEIS : 4930 Cheers and have a nice day, simon plouffe