A085370 Niven (or Harshad) numbers that are not divisible by 3.

1, 2, 4, 5, 7, 8, 10, 20, 40, 50, 70, 80, 100, 110, 112, 133, 140, 152, 190, 200, 209, 220, 224, 230, 247, 266, 280, 308, 320, 322, 364, 370, 392, 400, 407, 410, 440, 448, 460, 476, 481, 500, 506, 511, 512, 518, 550, 592, 605, 629, 640, 644, 700, 704, 715

Offset

1,2

Comments

a(n) mod A007953(a(n)) = 0 and A007953(a(n)) mod 3 > 0;

Intersection of A005349 and A001651.

Links

Table of n, a(n) for n=1..55.

Eric Weisstein's World of Mathematics, Harshad Number

Crossrefs

Cf. A085371.

Sequence in context: A127964 A269929 A364238 * A006693 A281641 A158850

Adjacent sequences: A085367 A085368 A085369 * A085371 A085372 A085373

Keyword

nonn,base

Author

Reinhard Zumkeller, Jun 26 2003

Status

approved