OFFSET
0,2
COMMENTS
Numbers n for which there exists at least one such integer k that k - A002828(k) = n, in other words, numbers n such that either A002828(1+n) is 1 or A002828(2+n) is 2 or A002828(3+n) is 3 or A002828(4+n) is 4, as the maximum value that A002828 may obtain is 4.
Indexing starts from zero, because a(0)=0 is a special case in this sequence.
LINKS
Antti Karttunen, Table of n, a(n) for n = 0..10000
PROG
(Scheme, with Antti Karttunen's IntSeq-library)
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Nov 25 2016
STATUS
approved