A195188
Number of decimal digits in n-th ultraprimorial.
Original entry on oeis.org
1, 1, 5, 45, 488, 7770, 134461, 2913994, 67769386, 1862487633, 63473407780, 2266783873440, 95508217654131, 4406526837238776, 210850931948426737, 10938149689908832133, 635914633137982893475, 40923887389117331715131, 2705755577277227205802881
Offset: 0
A195529
Ultracompositorial: Compositorials raised to the power of themselves.
Original entry on oeis.org
1, 256, 1333735776850284124449081472843776
Offset: 0
A174212
Ultradoublefactorials: a(n) = (n!!)^(n!!).
Original entry on oeis.org
1, 1, 4, 27, 16777216, 437893890380859375, 500702078263459319174537025249570888246709955377400223021257741084821677152403456
Offset: 0
For n=4 the doublefactorial is n!! = 4*2 = 8 and a(n) = n!!^n!! = 8^8 = 16777216.
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P:=proc(i) local a,n; for n from 0 by 1 to i do print(doublefactorial(n)^doublefactorial(n)); od; end: P(10);
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udf[n_]:=Module[{c=n!!},c^c]; Array[udf,7,0] (* Harvey P. Dale, Aug 17 2017 *)
Showing 1-3 of 3 results.
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