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).

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

1,1

Comments

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

Links

Table of n, a(n) for n=1..52.

Crossrefs

Cf. A001414, A328736, A328737.

Sequence in context: A364702 A357429 A258694 * A067191 A080854 A255267

Adjacent sequences: A328735 A328736 A328737 * A328739 A328740 A328741

Keyword

nonn

Author

Robert Bilinski, Oct 26 2019

Status

approved