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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A328737 Numbers k such that at least one of sopfr(k-1) and sopfr(k+1) is greater than or equal to 3*sopfr(k).

Original entry on oeis.org

30, 32, 36, 40, 42, 48, 52, 54, 60, 66, 68, 70, 72, 75, 78, 80, 81, 84, 88, 90, 96, 98, 100, 102, 104, 105, 108, 110, 112, 114, 117, 126, 128, 130, 132, 135, 136, 138, 140, 143, 147, 148, 150, 152, 156, 160, 162, 164, 165, 168, 172, 174, 176, 180
Offset: 1

Views

Author

Robert Bilinski, Oct 26 2019

Keywords

Comments

k-1 or k+1 or both have sums of prime factors at least 3 times the sum of prime factors of k.

Crossrefs

Cf. A001414, A328736, A328738.

A328738 Numbers k such that at least one of sopfr(k-1) and sopfr(k+1) is greater than or equal to 4*sopfr(k).

Original entry on oeis.org

48, 54, 60, 66, 70, 72, 78, 80, 84, 88, 90, 96, 98, 100, 102, 104, 108, 110, 112, 114, 126, 128, 130, 132, 135, 136, 138, 140, 147, 150, 152, 156, 162, 165, 168, 174, 180, 182, 190, 192, 195, 196, 198, 200, 210, 222, 224, 225, 228, 230, 232, 234
Offset: 1

Views

Author

Robert Bilinski, Oct 26 2019

Keywords

Comments

k-1 or k+1 or both have sums of prime factors at least 4 times the sum of prime factors of k.

Crossrefs

Cf. A001414, A328736, A328737.
Showing 1-2 of 2 results.

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

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