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A342232 a(1) = 2, a(n) = smallest palindromic nontrivial multiple of a(n-1) containing all decimal digits of a(n-1). 0
2, 22, 242, 24442, 4204024, 42044444024, 4204486446844024, 420448648888888846844024, 42049644864886388888368846844694024 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Differs from A082777 at a(5). a(n) <= (10^A055642(a(n-1))+1)*a(n-1). If a(n-1) > 10 and the last digit of a(n-1) <= 4, then a(n) <= (10^(A055642(a(n-1))-1)+1)*a(n-1).

LINKS

Table of n, a(n) for n=1..9.

EXAMPLE

a(5) = 4204024 is a palindromic multiple of a(4) = 24442 and contains two '2' and three '4', all the digits of a(4).

CROSSREFS

Cf. A055642, A082777.

Sequence in context: A322283 A151617 A334603 * A082777 A229465 A072076

Adjacent sequences:  A342229 A342230 A342231 * A342233 A342234 A342235

KEYWORD

nonn,base,more

AUTHOR

Chai Wah Wu, Mar 08 2021

EXTENSIONS

a(9) from Martin Ehrenstein, Mar 10 2021

STATUS

approved

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Last modified July 29 01:22 EDT 2021. Contains 346340 sequences. (Running on oeis4.)