cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-3 of 3 results.

A249045 Self-numbers (A003052) that are multiples of 3.

Original entry on oeis.org

3, 9, 42, 75, 108, 132, 165, 198, 222, 255, 288, 312, 345, 378, 411, 435, 468, 501, 525, 558, 591, 615, 648, 681, 714, 738, 771, 804, 828, 861, 894, 918, 951, 984, 1032, 1065, 1098, 1122, 1155, 1188, 1212, 1245, 1278, 1311, 1335, 1368, 1401, 1425, 1458, 1491
Offset: 1

Views

Author

N. J. A. Sloane, Oct 30 2014

Keywords

References

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

Links

Crossrefs

Cf. A003052, A249046-A249048.

Programs

  • Haskell
    a249045 n = a249045_list !! (n-1)
a249045_list = filter ((== 0) . flip mod 3) a003052_list
-- Reinhard Zumkeller, Oct 31 2014

A249046 Self-numbers (A003052) that are multiples of 3 but not of 9.

Original entry on oeis.org

3, 42, 75, 132, 165, 222, 255, 312, 345, 411, 435, 501, 525, 591, 615, 681, 714, 771, 804, 861, 894, 951, 984, 1032, 1065, 1122, 1155, 1212, 1245, 1311, 1335, 1401, 1425, 1491, 1515, 1581, 1614, 1671, 1704, 1761, 1794, 1851, 1884, 1941, 1974, 2022, 2055, 2112, 2145
Offset: 1

Views

Author

N. J. A. Sloane, Oct 30 2014

Keywords

References

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

Links

Crossrefs

Cf. A003052, A249045-A249048.

Programs

  • Haskell
    a249046 n = a249046_list !! (n-1)
a249046_list = filter ((> 0) . flip mod 9) a249045_list
-- Reinhard Zumkeller, Oct 31 2014

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

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane, Oct 30 2014

Keywords

References

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

Links

Crossrefs

Cf. A003052, A249045-A249048.

Programs

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

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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