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.

Previous Showing 11-16 of 16 results.

A115699 Primes whose digit reversal is the product of 2 palindromes greater than 1.

Original entry on oeis.org

23, 41, 53, 61, 223, 263, 283, 467, 509, 557, 607, 647, 719, 809, 829, 2131, 2141, 2153, 2347, 2351, 2521, 2531, 2593, 2731, 2767, 2953, 2957, 4091, 4261, 4603, 4751, 4817, 4951, 5171, 5393, 5651, 6173, 6361, 6571, 6581, 6761, 6763, 6791
Offset: 1

Views

Author

Giovanni Resta, Jan 31 2006

Keywords

Examples

			829 is prime and 928=4*232.

Crossrefs

Cf. A115683.

A115700 Squares whose digit reversal is the product of 2 palindromes greater than 1.

Original entry on oeis.org

4, 9, 36, 81, 121, 324, 400, 484, 900, 1089, 3600, 4356, 5184, 5625, 6561, 8100, 9801, 10201, 12100, 12321, 14641, 30276, 32400, 39204, 40000, 40804, 43681, 44944, 48400, 53361, 55696, 60516, 69696, 90000, 108900, 110889, 219024
Offset: 1

Views

Author

Giovanni Resta, Jan 31 2006

Keywords

Examples

			6561=81^2 and 1656=4*414

Crossrefs

Cf. A115683.

A115701 Cubes whose digit reversal is the product of 2 palindromes greater than 1.

Original entry on oeis.org

8, 27, 1331, 1728, 2197, 8000, 9261, 27000, 35937, 250047, 421875, 474552, 592704, 1030301, 1331000, 1367631, 1728000, 2197000, 2299968, 3048625, 6028568, 8000000, 9261000, 26198073, 27000000, 27818127, 35937000, 62099136
Offset: 1

Views

Author

Giovanni Resta, Jan 31 2006

Keywords

Examples

			250047=63^3 and 740052=9*82228.

Crossrefs

Cf. A115683.

A115702 Triangular numbers whose digit reversal is the product of 2 palindromes greater than 1.

Original entry on oeis.org

6, 21, 36, 45, 55, 66, 120, 210, 231, 253, 406, 465, 561, 630, 666, 820, 990, 3003, 3240, 4095, 4950, 5050, 5151, 5671, 5995, 6670, 8001, 20503, 23653, 24753, 29403, 31125, 33153, 37950, 41041, 43956, 54615, 57630, 60726, 63546, 66066, 73920
Offset: 1

Views

Author

Giovanni Resta, Jan 31 2006

Keywords

Examples

			8001=T(126) and 1008=4*252.

Crossrefs

Cf. A115683.

A115703 Pentagonal numbers (A000326) whose digit reversal is the product of 2 palindromes greater than 1.

Original entry on oeis.org

12, 22, 51, 210, 330, 425, 1162, 2882, 3876, 4510, 6902, 8400, 9801, 14652, 15251, 22632, 27270, 29330, 32340, 52360, 54055, 55777, 58707, 66676, 68587, 104412, 197472, 217551, 279720, 298151, 319935, 341055, 448540, 468442, 481950
Offset: 1

Views

Author

Giovanni Resta, Jan 31 2006

Keywords

Examples

			14652 is the 99th pentagonal number and 25641=77*333.

Crossrefs

Cf. A000326, A115683.

A164374 Numbers that are the sum of 2 distinct palindromic primes.

Original entry on oeis.org

5, 7, 8, 9, 10, 12, 13, 14, 16, 18, 103, 104, 106, 108, 112, 133, 134, 136, 138, 142, 153, 154, 156, 158, 162, 183, 184, 186, 188, 192, 193, 194, 196, 198, 202, 232, 252, 282, 292, 312, 315, 316, 318, 320, 322, 324, 332, 342, 355, 356, 358, 360, 364, 372, 375, 376, 378
Offset: 1

Views

Author

Juri-Stepan Gerasimov, Aug 14 2009

Keywords

Comments

Numbers of the form A002385(i)+A002385(j), i<> j.

Examples

			a(1)=2+3=5. a(2)=2+5=7. a(3)=3+5=8. 11+191=202. 101+131=232.

Crossrefs

Cf. A002385, A046400, A115683.

Programs

Extensions

Missing numbers inserted by R. J. Mathar, Aug 26 2009
Previous Showing 11-16 of 16 results.

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

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