OFFSET
1,2
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..10000
Eric Weisstein's World of Mathematics, Pairing Function
Indranil Ghosh, Python program to generate the sequence
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, May 10 2017
STATUS
approved