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.

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A381119 Index of n in A381019.

Original entry on oeis.org

1, 2, 3, 7, 4, 23, 5, 16, 13, 47, 6, 36, 8, 79, 63, 64, 9, 142, 10, 100, 113, 123, 11, 167, 30, 223, 91, 196, 12, 290, 14, 256, 201, 325, 149, 442, 15, 364, 330, 405, 17, 485, 18, 530, 534, 630, 19, 583, 55, 682, 382, 735, 20, 790, 346, 847, 259, 1034, 21, 1095
Offset: 1

Views

Author

N. J. A. Sloane, Feb 14 2025

Keywords

Comments

Every number does eventually appear in A381019 (see that sequence for proof).

Links

Crossrefs

Cf. A381019, A381115, A381116, A381118.

Extensions

More terms from Alois P. Heinz, Feb 14 2025

A379811 a(n) = index of 2*prime(n) in A381019.

Original entry on oeis.org

7, 23, 47, 79, 123, 223, 325, 364, 630, 910, 1034, 1310, 1610, 1857, 2219, 2819, 3378, 3979, 4499, 4773, 5057, 5790, 6899, 7581, 9226, 9429, 10225, 11459, 12329, 12781, 15890, 16910, 18506, 19887, 22211, 22514, 23738, 27231, 27899, 29602, 32055, 32418, 37255, 38031
Offset: 1

Views

Author

N. J. A. Sloane, Feb 15 2025

Keywords

Examples

			A381019(47) = 10 = 2*prime(3), so a(3) = 47.

Crossrefs

Cf. A381019, A381118.

Extensions

More terms from Michael De Vlieger, Feb 15 2025.
Showing 1-2 of 2 results.

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

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