Ultrafactorial

Factorials raised to the power of themselves are called ultrafactorials. The first few ultrafactorials are 1, 1, 4, 46656 … (Sequence A046882 of OEIS). According to the website cnki.com, functions like ultrafactorial and duplicate exponents are used to rectify the systematic errors in increasing load forecasting by linear regression. Hence they are helpful in forecasting annual electricity. Similarly ultraprimorials can also be defined as primorials raised to the power of themselves. The first few ultraprimorials 1, 4, 46656, … (Sequence A165812 of OEIS).

单词	Ultrafactorial
释义	Ultrafactorial Factorials raised to the power of themselves are called ultrafactorials. The first few ultrafactorials are 1, 1, 4, 46656 … (Sequence A046882 of OEIS). According to the website cnki.com, functions like ultrafactorial and duplicate exponents are used to rectify the systematic errors in increasing load forecasting by linear regression. Hence they are helpful in forecasting annual electricity. Similarly ultraprimorials can also be defined as primorials raised to the power of themselves. The first few ultraprimorials 1, 4, 46656, … (Sequence A165812 of OEIS).
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