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A225586 Floor((5^n-1)/n). 1
4, 12, 41, 156, 624, 2604, 11160, 48828, 217013, 976562, 4438920, 20345052, 93900240, 435965401, 2034505208, 9536743164, 44878791360, 211927625868, 1003867701480, 4768371582031, 22706531343005, 108372081409801, 518301258916440, 2483526865641276 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 1..300

MATHEMATICA

Table[Floor[(5^n - 1) / n], {n, 30}] (* or *) Table[Quotient[5^n - 1, n], {n, 30}]

PROG

(MAGMA) [Floor((5^n-1)/n): n in [1..30]];

CROSSREFS

Cf. A024049, A034474, A082482, A129795.

Sequence in context: A149341 A149342 A149343 * A242468 A242469 A242470

Adjacent sequences:  A225583 A225584 A225585 * A225587 A225588 A225589

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, May 30 2013

STATUS

approved

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Last modified April 15 13:37 EDT 2021. Contains 342977 sequences. (Running on oeis4.)