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.

A269060 Magic sums of 3 X 3 semimagic squares composed of positive triangular numbers.

Original entry on oeis.org

711, 1251, 1712, 2132, 2616, 2812, 2934, 3357, 3441, 3781, 3812, 4156, 4288, 4842, 4971, 4972, 5346, 5382, 5659, 5842, 5886, 6147, 6159, 6402, 6734, 7062, 7312, 7403, 7592, 7722, 8034, 8342, 8831, 8862, 8961, 9092, 9117, 9496, 9987, 10066, 10261, 10341
Offset: 1

Views

Author

Arkadiusz Wesolowski, Feb 18 2016

Keywords

Examples

			A semimagic square with sum 711:
  |----|----|----|
  | 15 | 66 |630 |
  |----|----|----|
  |231 |435 | 45 |
  |----|----|----|
  |465 |210 | 36 |
  |----|----|----|

Links

Crossrefs

Subsequence of A265197 and A269062.
Cf. A000217, A265141, A269061.

A265198 Magic sums of 3 X 3 semimagic squares composed of squares.

Original entry on oeis.org

3249, 3969, 4225, 5041, 5691, 6241, 6561, 7225, 7329, 8281, 8649, 8841, 9025, 9801, 10011, 10794, 11025, 11306, 11449, 11881, 12219, 12321, 12769, 12996, 13689, 13699, 13701, 14114, 14161, 14641, 15129, 15625, 15876, 16129, 16186, 16625, 16641, 16900
Offset: 1

Views

Author

Arkadiusz Wesolowski, Dec 04 2015

Keywords

Comments

These semimagic squares are composed of 9 distinct square numbers >= 0.

Examples

			A semimagic square with sum 4225:
  |----|----|----|
  |  0 | 625|3600|
  |----|----|----|
  |1521|2304| 400|
  |----|----|----|
  |2704|1296| 225|
  |----|----|----|

Links

Crossrefs

Cf. A000290, A265141, A265197, A269061 (for positive squares).

A269297 Magic sums of 3 X 3 semimagic squares composed of odd squares.

Original entry on oeis.org

5691, 10011, 12219, 13699, 17059, 19891, 20931, 22499, 23475, 26859, 27531, 30251, 30499, 33251, 34307, 38739, 39771, 39779, 40275, 42771, 43059, 45275, 46739, 47091, 49179, 49275, 51219, 53875, 53979, 56499, 58499, 59227, 60739, 61779, 64275, 64819
Offset: 1

Views

Author

Arkadiusz Wesolowski, Feb 21 2016

Keywords

Links

Crossrefs

Cf. A016754, A265197. Subsequence of A269061.

Formula

a(n) = 8*A265197(n) + 3.
Showing 1-3 of 3 results.

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

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