OFFSET
1,2
EXAMPLE
First few terms of A137292 are 1,3,4,5,7,8,10,13,14,15,17,... . The first gap of length 1 is between 1 and 3, hence a(1) = 1; the first gap of length 2 is between 10 and 13, hence a(2) = 10.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Klaus Brockhaus, Mar 31 2008
STATUS
approved