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URL: https://oeis.org/A352239

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A352239

Numbers k such that the decimal expansion of k and 14^k both begin with 14.

1

1404, 1445, 1486, 1493, 14023, 14071, 14112, 14153, 14160, 14201, 14242, 14283, 14290, 14331, 14372, 14379, 14420, 14461, 14502, 14509, 14550, 14591, 14639, 14680, 14721, 14728, 14769, 14810, 14851, 14858, 14899, 14940, 14947, 14988, 140029, 140070, 140118, 140159

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OFFSET

1,1

COMMENTS

Subsequence of A352179.

LINKS

Chai Wah Wu, Table of n, a(n) for n = 1..4098

EXAMPLE

Both 1404 and 14^1404 = 1458... start with the digits 14.

PROG

(Python)

from itertools import count, islice

def A352239_gen(): # generator of terms

for l in count(0):

k14 = 14**(14*10**l)

for k in range(14*10**l, 15*10**l):

if str(k14)[:2] == '14':

yield k

k14 *= 14

A352239_list = list(islice(A352239_gen(), 20))

CROSSREFS

Sequence in context: A178271 A271579 A271712 * A206680 A022058 A107522

Adjacent sequences: A352236 A352237 A352238 * A352240 A352241 A352242

KEYWORD

nonn,base

AUTHOR

Chai Wah Wu, Mar 08 2022

STATUS

approved