A018178 - OEIS

A018178

Powers of fifth root of 22 rounded to nearest integer.

1, 2, 3, 6, 12, 22, 41, 76, 141, 261, 484, 898, 1667, 3092, 5738, 10648, 19758, 36664, 68033, 126243, 234256, 434686, 806603, 1496733, 2777339, 5153632, 9563083, 17745264, 32928126, 61101455, 113379904

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OFFSET

0,2

LINKS

Table of n, a(n) for n=0..30.

MATHEMATICA

Round/@((Power[22, (5)^-1])^Range[0, 30]) (* Harvey P. Dale, Jan 31 2011 *)

PROG

(Python)

from sympy import integer_nthroot

def A018178(n): return -integer_nthroot(m:=11**n<<n, 5)[0]+integer_nthroot(m<<5, 5)[0] # Chai Wah Wu, Jun 20 2024

CROSSREFS

Cf. A011107.

Sequence in context: A082877 A047090 A185265 * A112575 A018079 A289920

Adjacent sequences: A018175 A018176 A018177 * A018179 A018180 A018181

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

STATUS

approved