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 1-10 of 11 results. Next

A066123 Numbers that in base 2 need two 'Reverse and Add' steps to reach a palindrome.

Original entry on oeis.org

11, 13, 23, 29, 39, 43, 53, 55, 57, 59, 69, 79, 81, 87, 91, 109, 117, 121, 133, 143, 151, 161, 167, 171, 173, 175, 179, 181, 183, 205, 207, 213, 215, 229, 233, 235, 237, 239, 241, 243, 245, 247, 261, 265, 277, 287, 289, 303, 311, 321, 327, 337, 343, 347, 349
Offset: 1

Views

Author

Klaus Brockhaus, Dec 08 2001

Keywords

Comments

The analog of A065207 in base 2. The number of steps starts at 0, so palindromes (cf. A006995) are excluded.
Numbers k such that A066057(k) = 2. - Andrew Howroyd, Dec 05 2024

Links

Crossrefs

Cf. A006995, A065207, A066057, A066122.

Programs

  • PARI
    isok(n,s=2)={for(k=0, s, my(r=fromdigits(Vecrev(binary(n)),2)); if(r==n, return(k==s)); n += r); 0} \\ Andrew Howroyd, Dec 05 2024

Extensions

Offset changed from 0 to 1 by Harry J. Smith, Feb 01 2010

A066124 Numbers that in base 2 need three 'Reverse and Add' steps to reach a palindrome.

Original entry on oeis.org

44, 50, 54, 58, 72, 92, 98, 118, 154, 156, 184, 194, 206, 214, 216, 234, 242, 272, 296, 316, 364, 376, 386, 406, 466, 470, 478, 502, 564, 566, 570, 572, 626, 628, 634, 688, 690, 696, 716, 732, 748, 752, 770, 790, 798, 806, 814, 820, 822, 824, 854, 870, 880
Offset: 1

Views

Author

Klaus Brockhaus, Dec 08 2001

Keywords

Comments

The analog of A065208 in base 2. The number of steps starts at 0, so palindromes (cf. A006995) are excluded.
Numbers k such that A066057(k) = 3. - Andrew Howroyd, Dec 05 2024

Links

Crossrefs

Cf. A006995, A065208, A066057, A066122.

Programs

  • PARI
    isok(n,s=3)={for(k=0, s, my(r=fromdigits(Vecrev(binary(n)),2)); if(r==n, return(k==s)); n += r); 0} \\ Andrew Howroyd, Dec 05 2024

Extensions

Offset changed from 0 to 1 by Harry J. Smith, Feb 01 2010

A066125 Numbers that in base 2 need four 'Reverse and Add' steps to reach a palindrome.

Original entry on oeis.org

19, 25, 71, 83, 101, 111, 113, 123, 271, 283, 295, 307, 319, 331, 333, 335, 355, 357, 359, 379, 395, 397, 409, 415, 419, 421, 431, 433, 439, 445, 457, 461, 463, 475, 481, 485, 487, 491, 499, 505, 571, 627, 825, 881, 911, 967, 1055, 1079, 1083, 1103, 1127
Offset: 1

Views

Author

Klaus Brockhaus, Dec 08 2001

Keywords

Comments

The analog of A065209 in base 2. The number of steps starts at 0, so palindromes (cf. A006995) are excluded.
Numbers k such that A066057(k) = 4. - Andrew Howroyd, Dec 05 2024

Links

Crossrefs

Cf. A006995, A065209, A066057, A066122.

Programs

Extensions

Offset changed from 0 to 1 by Harry J. Smith, Feb 01 2010

A066126 Numbers that in base 2 need five 'Reverse and Add' steps to reach a palindrome.

Original entry on oeis.org

20, 76, 88, 230, 238, 246, 274, 276, 278, 284, 308, 314, 332, 336, 338, 344, 356, 368, 380, 400, 404, 440, 464, 660, 662, 676, 678, 694, 702, 758, 916, 932, 948, 956, 1012, 1076, 1078, 1084, 1106, 1124, 1126, 1132, 1142, 1180, 1204, 1228, 1252, 1308
Offset: 1

Views

Author

Klaus Brockhaus, Dec 08 2001

Keywords

Comments

The analog of A065210 in base 2. The number of steps starts at 0, so palindromes (cf. A006995) are excluded.
Numbers k such that A066057(k) = 5. - Andrew Howroyd, Dec 05 2024

Links

Crossrefs

Cf. A006995, A065210, A066057, A066122.

Extensions

Offset changed from 0 to 1 by Harry J. Smith, Feb 01 2010

A066127 Numbers that in base 2 need six 'Reverse and Add' steps to reach a palindrome.

Original entry on oeis.org

275, 301, 317, 361, 377, 401, 523, 579, 587, 603, 619, 637, 761, 777, 833, 841, 857, 873, 1043, 1063, 1091, 1107, 1179, 1197, 1213, 1227, 1261, 1277, 1293, 1295, 1315, 1413, 1415, 1437, 1439, 1449, 1465, 1485, 1487, 1513, 1529, 1553, 1555, 1573
Offset: 1

Views

Author

Klaus Brockhaus, Dec 08 2001

Keywords

Comments

The analog of A065211 in base 2. The number of steps starts at 0, so palindromes (cf. A006995) are excluded.
Numbers k such that A066057(k) = 6. - Andrew Howroyd, Dec 05 2024

Links

Crossrefs

Cf. A006995, A065211, A066057, A066122.

Extensions

Offset changed from 0 to 1 by Harry J. Smith, Feb 01 2010

A066128 Numbers that in base 2 need seven 'Reverse and Add' steps to reach a palindrome.

Original entry on oeis.org

326, 366, 452, 492, 644, 654, 692, 710, 718, 734, 750, 826, 882, 902, 908, 926, 942, 964, 972, 974, 982, 988, 990, 998, 1004, 1006, 1058, 1068, 1110, 1166, 1188, 1246, 1320, 1332, 1340, 1362, 1380, 1388, 1418, 1440, 1460, 1498, 1502, 1508, 1568
Offset: 1

Views

Author

Klaus Brockhaus, Dec 08 2001

Keywords

Comments

The analog of A065212 in base 2. The number of steps starts at 0, so palindromes (cf. A006995) are excluded.
Numbers k such that A066057(k) = 7. - Andrew Howroyd, Dec 05 2024

Links

Crossrefs

Cf. A006995, A065212, A066057, A066122.

Extensions

Offset changed from 0 to 1 by Harry J. Smith, Feb 01 2010

A066129 Numbers that in base 2 need eight 'Reverse and Add' steps to reach a palindrome.

Original entry on oeis.org

259, 285, 309, 345, 369, 385, 399, 423, 459, 479, 483, 503, 531, 547, 563, 653, 655, 709, 711, 785, 801, 817, 909, 919, 935, 959, 965, 1015, 1031, 1037, 1051, 1053, 1099, 1101, 1157, 1171, 1173, 1219, 1221, 1243, 1283, 1289, 1305, 1353, 1409, 1423
Offset: 1

Views

Author

Klaus Brockhaus, Dec 08 2001

Keywords

Comments

The analog of A065213 in base 2. The number of steps starts at 0, so palindromes (cf. A006995) are excluded.
Numbers k such that A066057(k) = 8. - Andrew Howroyd, Dec 05 2024

Links

Crossrefs

Cf. A006995, A065213, A066057, A066122.

Extensions

Offset changed from 0 to 1 by Harry J. Smith, Feb 01 2010

A066130 Numbers that in base 2 need nine 'Reverse and Add' steps to reach a palindrome.

Original entry on oeis.org

202, 210, 218, 222, 250, 282, 306, 312, 334, 358, 408, 432, 454, 460, 484, 778, 834, 842, 846, 858, 862, 874, 878, 970, 986, 1002, 1080, 1128, 1182, 1200, 1230, 1248, 1292, 1316, 1412, 1434, 1482, 1692, 1740, 1944, 1992, 2162, 2274, 2582, 2684, 2694
Offset: 1

Views

Author

Klaus Brockhaus, Dec 08 2001

Keywords

Comments

The analog of A065214 in base 2. The number of steps starts at 0, so palindromes (cf. A006995) are excluded.
Numbers k such that A066057(k) = 9. - Andrew Howroyd, Dec 05 2024

Links

Crossrefs

Cf. A006995, A065214, A066057, A066122.

Extensions

Offset changed from 0 to 1 by Harry J. Smith, Feb 01 2010

A066131 Numbers that in base 2 need ten 'Reverse and Add' steps to reach a palindrome.

Original entry on oeis.org

103, 115, 137, 145, 159, 187, 221, 249, 391, 407, 411, 435, 451, 467, 525, 581, 649, 705, 719, 733, 735, 749, 751, 973, 989, 1005, 1151, 1165, 1245, 1271, 1403, 1417, 1497, 1523, 1661, 1781, 1913, 2033, 2059, 2083, 2097, 2115, 2129, 2147, 2209, 2241
Offset: 1

Views

Author

Klaus Brockhaus, Dec 08 2001

Keywords

Comments

The analog of A065215 in base 2. The number of steps starts at 0, so palindromes (cf. A006995) are excluded.
Numbers k such that A066057(k) = 10. - Andrew Howroyd, Dec 05 2024

Links

Crossrefs

Cf. A006995, A065215, A066057, A066122.

A066132 Numbers that in base 2 need eleven 'Reverse and Add' steps to reach a palindrome.

Original entry on oeis.org

74, 104, 188, 298, 424, 494, 600, 616, 1276, 1286, 1454, 1470, 1518, 1528, 1786, 1790, 1796, 1964, 1980, 2028, 2042, 2144, 2552, 2556, 2564, 2566, 2598, 2622, 2630, 2654, 2662, 2676, 2686, 2734, 2766, 2788, 2798, 2870, 2902, 2934, 2982, 3014, 3046
Offset: 1

Views

Author

Klaus Brockhaus, Dec 08 2001

Keywords

Comments

The analog of A065216 in base 2. The number of steps starts at 0, so palindromes (cf. A006995) are excluded.
Numbers k such that A066057(k) = 11. - Andrew Howroyd, Dec 05 2024

Links

Crossrefs

Cf. A006995, A065216, A066057, A066122.

Extensions

Offset changed from 0 to 1 by Harry J. Smith, Feb 01 2010
Showing 1-10 of 11 results. Next

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

Content is available under The OEIS End-User License Agreement.