A139386 First gap of length at least n in A007950, lower end.
1, 5, 5, 37, 37, 187, 187, 821, 821, 821, 821, 13301, 13301, 109941, 109941, 522717, 522717, 522717, 522717, 1247282901, 1247282901
Offset: 1
Examples
First few terms of A007950 are 1,3,5,9,11, ... . The first gap of length 1 is between 1 and 3, so a(1) = 1; the first gap of length 2 is between 5 and 9; it has length 3, so a(2) = a(3) = 5.
Extensions
a(20)-a(21) from Donovan Johnson, Dec 27 2010
Comments