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.

A101763 Iccanobif semiprime indices: Indices of semiprime numbers in A001129.

Original entry on oeis.org

8, 10, 15, 17, 35, 37, 47, 53, 62, 66, 74, 79, 110, 127, 146, 214, 231, 241, 242, 245, 250, 277, 293, 302, 343, 485, 525, 550, 599, 638, 687, 733, 805, 814
Offset: 1

Views

Author

Jonathan Vos Post and Ray Chandler, Dec 15 2004

Keywords

Comments

This sequence also includes 881, 946, 954, 1086, 1753, and 1771. It might or might not include 838, 849, 1073, 1667, 1741, 1870, 2155, and 2478, but the required factoring proved rather difficult. There are no further terms below 2478. - Lucas A. Brown, Nov 19 2022

Links

Crossrefs

Cf. A001358, A001129, A014258, A014259, A014260, A101764, A101765, A101766.

Extensions

Missing 302 inserted and 525 added by Sean A. Irvine, Apr 29 2022
a(28)-a(34) from Lucas A. Brown, Nov 21 2022

A101765 Iccanobif semiprime indices: Indices of semiprime numbers in A014259.

Original entry on oeis.org

8, 9, 15, 16, 18, 22, 32, 37, 46, 53, 61, 62, 64, 79, 82, 106, 121, 129, 149, 153, 229, 241, 266, 301, 381, 411, 502
Offset: 1

Views

Author

Jonathan Vos Post and Ray Chandler, Dec 15 2004

Keywords

Comments

This sequence also includes 742, 987, 1147, 1246, 1337, 1373, 1454, 1493, 1537, 1835, 1967, and 2265. It might or might not include 622, 630, 647, 817, 1247, 1402, 1422, 1477, 1649, 1781, 1818, 1867, 1874, and 2115, but the required factoring proved rather difficult. There are no further terms below 2265. - Lucas A. Brown, Nov 12 2022

Links

Crossrefs

Cf. A001358, A001129, A014258, A014259, A014260, A101763, A101764, A101766.

Extensions

a(27) from Lucas A. Brown, Nov 12 2022

A101766 Iccanobif semiprime indices: Indices of semiprime numbers in A014260.

Original entry on oeis.org

8, 16, 18, 21, 26, 38, 42, 44, 49, 54, 55, 57, 61, 67, 77, 78, 115, 123, 134, 145, 151, 154, 202, 218, 249, 286, 349, 403, 498, 539, 647
Offset: 1

Views

Author

Jonathan Vos Post and Ray Chandler, Dec 15 2004

Keywords

Comments

This sequence also includes 790, 1161, 1347, 1418, 1595, 1761, and 2018. It might or might not include 769, 1394, 1795, 1983, 2093, 2178, but the required factoring proved rather difficult. There are no further terms below 2178. - Lucas A. Brown, Nov 12 2022

Links

Crossrefs

Cf. A001358, A001129, A014258, A014259, A014260, A101763, A101764, A101765.

Programs

Extensions

Offset changed to 1 by Jinyuan Wang, Aug 01 2021
a(31) from Lucas A. Brown, Nov 12 2022
Showing 1-3 of 3 results.

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

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