A249047 Self-numbers (A003052) that are not divisible by 3.

1, 5, 7, 20, 31, 53, 64, 86, 97, 110, 121, 143, 154, 176, 187, 209, 211, 233, 244, 266, 277, 299, 310, 323, 334, 356, 367, 389, 400, 413, 424, 446, 457, 479, 490, 512, 514, 536, 547, 569, 580, 602, 613, 626, 637, 659, 670, 692, 703, 716

Offset

1,2

References

D. R. Kaprekar, The Mathematics of the New Self Numbers, Privately printed, 311 Devlali Camp, Devlali, India, 1963.

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

D. R. Kaprekar, The Mathematics of the New Self Numbers [annotated and scanned]

Prog

(Haskell)
a249047 n = a249047_list !! (n-1)
a249047_list = filter ((> 0) . flip mod 3) a003052_list
-- Reinhard Zumkeller, Oct 31 2014

Crossrefs

Cf. A003052, A249045-A249048.

Sequence in context: A117321 A279252 A279957 * A258282 A192422 A120035

Adjacent sequences: A249044 A249045 A249046 * A249048 A249049 A249050

Keyword

nonn,base

Author

N. J. A. Sloane, Oct 30 2014

Status

approved