A062901 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A062901

Number and its reversal are both multiples of 7.

7, 70, 77, 161, 168, 252, 259, 343, 434, 525, 595, 616, 686, 700, 707, 770, 777, 861, 868, 952, 959, 1001, 1008, 1071, 1078, 1162, 1169, 1253, 1344, 1435, 1526, 1596, 1610, 1617, 1680, 1687, 1701, 1708, 1771, 1778, 1862, 1869, 1953, 2002, 2009

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Oren Meisner, Table of n, a(n) for n = 1..10000

EXAMPLE

168 and 861 are both multiples of 7.

MATHEMATICA

Select[7Range[300], Divisible[FromDigits[Reverse[IntegerDigits[#]]], 7]&] (* Harvey P. Dale, Oct 03 2011 *)

PROG

(ARIBAS): n := 7; stop := 2400; m := 0; while m < stop do rev := int_reverse(m); if rev mod n = 0 then write(m, " "); end; inc( m, n); end;

(PARI) isok(n) = !(n%7) && !(fromdigits(Vecrev(digits(n))) % 7); \\ Michel Marcus, Aug 14 2018