OFFSET
1,4
COMMENTS
a(1) = 0 as the 1 is outside of array A278511 proper.
LINKS
Antti Karttunen, Table of n, a(n) for n = 1..10707
FORMULA
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Nov 23 2016
STATUS
approved