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A074901 Increasingly larger bases required for composite numbers to become prime by base reversal (A075243). 1
0, 2, 4, 6, 8, 9, 12, 26, 27, 34, 38, 48, 54, 60, 96, 150, 168, 180, 420, 438, 462, 468, 522, 540, 570, 828, 1320, 1782, 2130, 2142, 2280, 2370, 2448, 2700, 2760, 2790, 2808, 2922, 2952, 2982, 3012, 3402, 3570, 3582, 3972, 4218, 4860, 5148 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..48.

CROSSREFS

Cf. A075243.

Sequence in context: A298305 A090958 A245047 * A189294 A125990 A319776

Adjacent sequences:  A074898 A074899 A074900 * A074902 A074903 A074904

KEYWORD

nonn,base,hard,more

AUTHOR

Robert G. Wilson v, Sep 16 2002

EXTENSIONS

More terms from Amiram Eldar, Jun 04 2021

STATUS

approved

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Last modified October 27 13:40 EDT 2021. Contains 348276 sequences. (Running on oeis4.)