

A069560


Squares in which the kth significant digit either divides k or is a multiple of k.


1



1, 4, 9, 16, 25, 49, 64, 81, 121, 144, 169, 324, 361, 625, 961, 1369, 1681, 2116, 2916, 4624, 8649, 11664, 12321, 14161, 14641, 51984, 114921, 151321, 214369, 311364, 351649, 1151329, 1252161, 1658944, 7311616, 7354944, 41254929, 41654116
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OFFSET

0,2


COMMENTS

If the smallest prime divisor of n is > 7 then the nth digit is 1.


LINKS

Table of n, a(n) for n=0..37.


EXAMPLE

8649 is a member in which the fourth digit is 8 a multiple of 4, the third one is 6 a multiple of 3, the second one is 4 a multiple of 2 and the least significant digit is 9.


CROSSREFS

Cf. A069556, A069557, A069558, A069559.
Sequence in context: A065741 A188061 A279456 * A075494 A063735 A056798
Adjacent sequences: A069557 A069558 A069559 * A069561 A069562 A069563


KEYWORD

base,nonn


AUTHOR

Amarnath Murthy, Mar 22 2002


EXTENSIONS

More terms from Sascha Kurz, Mar 23 2002


STATUS

approved



