A000142Factorial numbers: n! = 1*2*3*4*...*n (order of symmetric group S_n, number of permutations of n letters).

1, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800, 39916800, 479001600, 6227020800, 87178291200, 1307674368000, …

The first 5 terms appear at position 1,380,572.

…463746547016958145986255112624354368130580148858737825…
position 1,380,572
termsstringfirst positionoccurrences
11199,997,334
211949,997,964
31127091,000,085
4112612,70299,823
51126241,380,572968
6112624120not within 1,000,000,0000
7112624120720not within 1,000,000,0000

Searched the first 1,000,000,000 digits. Strings longer than 12 digits are not indexed.