A285040 Numbers n such that three-halves of n equals the reverse of n.

4356, 43956, 439956, 4399956, 43564356, 43999956, 435604356, 439999956, 4356004356, 4395643956, 4399999956, 43560004356, 43956043956, 43999999956, 435600004356, 435643564356, 439560043956, 439956439956, 439999999956

Offset

1,1

Comments

There are Fibonacci(floor((n-2)/2)) terms with n digits (this is essentially A103609). - Ray Chandler, Oct 12 2017

References

David Wells, The Penguin Dictionary of Curious and Interesting Numbers (Rev. ed. 1997), p. 158.

Links

Ray Chandler, Table of n, a(n) for n = 1..10000

Example

439956 times 3/2 equals 659934 which is the reverse of 439956.

Mathematica

Select[2 Range[10^7], 3(#/2) == FromDigits@ Reverse@ IntegerDigits@ # &] (* Giovanni Resta, Apr 08 2017 *)

Prog

(PARI) isok(n) = 3*n/2 == fromdigits(Vecrev(digits(n))); \\ Michel Marcus, Apr 09 2017

Crossrefs

Cf. A101704, A101705, A101706, A001232, A008918.

Sequence in context: A185796 A250817 A154084 * A203928 A340457 A176111

Adjacent sequences: A285037 A285038 A285039 * A285041 A285042 A285043

Keyword

nonn,base

Author

Harvey P. Dale, Apr 08 2017

Extensions

Data corrected by Giovanni Resta, Apr 08 2017

Status

approved