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A069560 Squares in which the k-th 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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

If the smallest prime divisor of n is > 7 then the n-th 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

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Last modified May 31 19:40 EDT 2020. Contains 334748 sequences. (Running on oeis4.)