This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A057530 n is odd and divisible by number of divisors of n and sum of digits of n. 1
 1, 9, 225, 441, 1521, 2025, 2601, 12321, 40401, 62001, 99225, 103041, 251001, 321489, 585225, 893025, 1022121, 1108809, 1212201, 1320201, 1946025, 2368521, 2480625, 2772225, 3101121, 3744225, 4473225, 4862025, 5517801, 6125625 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS For most values (except 9,2025 and 99225) number of divisors of n = sum of digits of n, see A057531. The above comment is wrong: for 16 out of the first 34 terms of the sequence, the number of divisors of n does not equal the sum of the digits of n. - Harvey P. Dale, Dec 31 2015 LINKS MATHEMATICA Select[Range[1, 5*10^6, 2], Divisible[#, DivisorSigma[0, #]] && Divisible[ #, Total[ IntegerDigits[#]]]&] (* Harvey P. Dale, Dec 31 2015 *) CROSSREFS Cf. A005349, A033950, A057529. Sequence in context: A110260 A036896 A120319 * A014736 A017558 A159939 Adjacent sequences:  A057527 A057528 A057529 * A057531 A057532 A057533 KEYWORD nonn,easy,base AUTHOR Asher Auel (asher.auel(AT)reed.edu) Sep 03 2000 EXTENSIONS More terms from Harvey P. Dale, Dec 31 2015 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 16 02:16 EDT 2019. Contains 327088 sequences. (Running on oeis4.)