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.

A129729 Primes dividing numbers k such that k divides the k-th Lucas number A000032(k).

Original entry on oeis.org

2, 3, 107, 1283, 8747, 21401, 34667, 46187, 104003, 137387, 138563, 374929, 549547, 2204243, 2771281, 2808107, 11128427, 11223683, 13497443, 14880347, 21747529, 22753547, 23712683, 33697283, 44513387, 46970929, 57395627, 65898683
Offset: 1

Views

Author

Alexander Adamchuk, May 12 2007

Keywords

Comments

A prime p belongs to this sequence iff for some positive integer m, m*p divides A000032(m*p) or, alternatively, m*p belongs to A016089.
The minimum multiples from A016089 of listed primes are given by A140258.

Links

Crossrefs

Cf. A000032, A016089, A140258.

Extensions

Revised and extended by Max Alekseyev, May 16 2008

A171981 Smallest multiples from A129066 of primes from A171980.

Original entry on oeis.org

5, 75025, 9006076025, 332813125, 54036081025, 162108093025, 12304690625, 3662109765625, 1238325212525, 225150026875625, 8562180281412026525, 309581286250625, 15197626762525, 4520507828125, 2059936966552758203125
Offset: 1

Views

Author

Max Alekseyev, Jan 20 2010

Keywords

Comments

A129066 lists integers n such that n divides n-th Fibonacci number A000045(n) with multiples of 12 excluded, while A171980 lists possible prime divisors of elements of A129066 in the increasing order. This sequence lists smallest multiples from A129066 of primes from A171980.

Crossrefs

Cf. A114207, A140258

Formula

a(n) = min { A129066(m) : A171980(n)|A129066(m) }

A354027 Smallest k dividing 3^k + 4^k that have divisor A354026(n).

Original entry on oeis.org

7, 2653, 4941601, 236474833, 20930936750059, 4899815786803, 330219333283, 4455186224209, 9770481627816301, 351829430300299, 26064955344333473991073, 192144131632327, 3006539977771582357, 2059085249993107, 13468375028434716454309, 1753571527639980559, 2338095370082599813
Offset: 1

Views

Author

Max Alekseyev, May 15 2022

Keywords

Comments

Smallest term of A045584 divisible by prime A354026(n).

Crossrefs

Cf. A045584, A354026, A114207, A140258, A171981.
Showing 1-3 of 3 results.

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

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