A242038 Integer part of square root of A010809(n) = n^21.

0, 1, 1448, 102275, 2097152, 21836601, 148111277, 747359260, 3037000499, 10460353203, 31622776601, 86024705429, 214488041413, 497055861119, 1082291816449, 2233357359474, 4398046511104, 8312155792152, 15148209527700, 26724698233906

Offset

0,3

Links

Karl V. Keller, Jr., Table of n, a(n) for n = 0..1000

Formula

a(n) = floor(sqrt(n^21)).

Example

For n = 4, floor(sqrt(4^21)) = 2097152.

Prog

(Python)
from decimal import *
getcontext().prec = 100
for n in range(0, 1001): print int(Decimal(n**21).sqrt())
(PARI) a(n) = sqrtint(n^21) \\ Michel Marcus, Oct 01 2014

Crossrefs

Cf. A010809 (n^21).

Sequence in context: A023311 A318710 A208486 * A045099 A325883 A237445

Adjacent sequences: A242035 A242036 A242037 * A242039 A242040 A242041

Keyword

nonn

Author

Karl V. Keller, Jr., Oct 01 2014

Status

approved