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 A152475 Number of digits in factorial numbers of the form: (n!^n!)!. 0
 1, 2, 197573, 43600856616158353989522412378215477 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS (1!^1!)!=1 -> 1 digit; (2!^2!)!=24 -> 2 digits; (3!^3!)!=veryverylargenumber -> 197573 digits; (4!^4!)!=?!... From Jon E. Schoenfield, Dec 21 2008: (Start) (3!^3!)! = (6^6)! = 46656! = 6.8964...*10^197572 (4!^4!)! = (24^24)! = 1333735776850284124449081472843776! = 1.1463...*10^43600856616158353989522412378215476. (End) LINKS Table of n, a(n) for n=1..4. MATHEMATICA a[n_]:=Length[IntegerDigits[(n!^n!)! ]]; CROSSREFS Sequence in context: A006935 A070833 A176584 * A124362 A228001 A202867 Adjacent sequences: A152472 A152473 A152474 * A152476 A152477 A152478 KEYWORD nonn,base AUTHOR Vladimir Joseph Stephan Orlovsky, Dec 05 2008 EXTENSIONS a(4) from Jon E. Schoenfield, Dec 21 2008 STATUS approved

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Last modified September 11 13:36 EDT 2024. Contains 375836 sequences. (Running on oeis4.)