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A254406 a(n) = floor(a(n-1)^(5/2)), a(1) = 2. 1
2, 5, 55, 22434, 75381849525, 1560152215306022835807766096, 96142947030750035305397690793504947854390697291777107758182668001398 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

The next term -- a(8) -- has 170 digits. - Harvey P. Dale, Apr 18 2022

LINKS

Table of n, a(n) for n=1..7.

FORMULA

a(n) ~ c^((5/2)^n), where c = 1.292359119971021796628915278748164958162881226395259818195999161... .

MATHEMATICA

RecurrenceTable[{a[1]==2, a[n]==Floor[a[n-1]^(5/2)]}, a, {n, 1, 10}]

NestList[Floor[(Sqrt[#])^5]&, 2, 10] (* Harvey P. Dale, Apr 18 2022 *)

CROSSREFS

Cf. A254405.

Sequence in context: A013171 A073422 A006525 * A260654 A339167 A042161

Adjacent sequences: A254403 A254404 A254405 * A254407 A254408 A254409

KEYWORD

nonn,easy

AUTHOR

Vaclav Kotesovec, Jan 30 2015

STATUS

approved

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Last modified January 28 20:13 EST 2023. Contains 359905 sequences. (Running on oeis4.)