@lowell Good effort but not quite.

Your results set picks up the recod with a time stamp of 41287 which is the first in a pair.

@chrism-2

Same answer as above: a pair is defined as a discreet pair; i.e. if you are the second in a pair, you cannot be the first in the next pair even when the records are consecutive.

so

40820 and 41201 are a pair

41287 and 44797 are a pair

53698 and 60518 are a pair