The sum of the first 70 consecutive odd numbers is 4,900.
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The first 20 odd numbers are: 13579111315171921232527293133353739.
The first 85 odd numbers are: 1 3579111315171921232527293133353739414345474951535557596163656769717375777981838587899193959799101103105107109111113115117119121123125127129131133135137139141143145147149151153155157159161163165167169.
The sum of the first 1,000 odd numbers is 1,000,000.
The sum of the first 13 odd numbers is 169.
The sum of the first nine odd numbers is 81.