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A191322 Number of bases in which both n and the reversal of n are 3-digit numbers. 3
0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 1, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 2, 1, 1, 2, 2, 1, 1, 2, 0, 0, 1, 2, 2, 2, 3, 2, 2, 2, 0, 0, 1, 2, 3, 3, 2, 2, 2, 3, 0, 1, 2, 2, 3, 4, 2, 3, 3, 3, 0, 1, 2, 3, 2, 2, 4, 4, 4, 4, 0, 0, 1, 2, 2, 1, 4, 4, 4, 4, 0, 0, 1 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,22

LINKS

Table of n, a(n) for n=1..82.

FORMULA

a(n)=a(inv(n)); a(A002113(n))=A191291(A002113(n)); a(n)<=min(A191291(n),A191291(inv(n)).

EXAMPLE

a(36)=3 since 36 is 3-digit number in bases 4,5,6 and 63 is 3-digit number in bases 4,5,6,7 such that we have 3 common bases.

CROSSREFS

Cf. A002113, A191291.

Sequence in context: A273134 A126207 A276711 * A264840 A308188 A046219

Adjacent sequences:  A191319 A191320 A191321 * A191323 A191324 A191325

KEYWORD

nonn,base

AUTHOR

Vladimir Shevelev, May 30 2011

STATUS

approved

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Last modified September 17 16:32 EDT 2021. Contains 347487 sequences. (Running on oeis4.)