thanks to Charles Landis for his post found here:
Enoch = 7th generation from Adam (see Jude)
7th triangle number = 28
all triangle numbers added through the 28 = 84.
17th triangle number = 153
years ago another reader astutely pointed out this info:
all triangle numbers added through the 17th (153) = 969.
Methuselah = Enoch's grandson.
Methuselah's lifespan from Genesis 5 = 969, the longest lifespan recorded in the Bible.
Methuselah dies 'out of place', so to speak. he dies at the End, the year of the Flood 1656. thus he is a Last Days type, imho, possibly of the Church Age.