1,2

First few terms of A136110 are 1,3,4,6,7,9,12,13,15,17,18,22,23,... . The first gap of length 1 is between 1 and 3, hence a(1) = 1; the first gap of length 2 is between 9 and 12, hence a(2) = 9; the first gap of length 3 is between 18 and 22, hence a(3) = 18. The first gap of length at least 7 is between 2580 and 2592; it has length 11,

hence a(7) = a(8) = a(9) = a(10) = a(11) = 2580.

Cf. A136110, A138899, A138845.

Sequence in context: A033896 A005010 A000547 this_sequence A057373 A086500 A022669

Adjacent sequences: A138897 A138898 A138899 this_sequence A138901 A138902 A138903

nonn,more

Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Apr 03 2008