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A342976 Numbers k such that both distances from A002182(k-1) to A002182(k) and from A002182(k) to A002182(k+1) are not terms of A002182 (highly composite numbers). 0
16, 39, 55, 58, 74, 83, 86, 87, 107, 108, 111, 112, 113, 122, 123, 124, 125, 126, 127, 128, 147, 148, 165, 179, 180, 181, 201, 202, 205, 206, 207, 219, 223, 224, 225, 226, 242, 243, 244, 245, 246, 247, 251, 257, 260, 264, 265, 266, 267, 268, 269, 270, 274, 277, 278, 279, 280 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..57.

EXAMPLE

16 is a term, since A002182(16) - A002182(15) = 420 and A002182(17) - A002182(16) = 420 are not terms of A002182. 17 is not a term, since A002182(17) - A002182(16) = 420 is not a term of A002182, but A002182(18) - A002182(17) = 2520 is.

MATHEMATICA

hcn=Cases[Import["https://oeis.org/A002182/b002182.txt", "Table"], {_, _}][[All, 2]]; a={};

Table[If[FreeQ[hcn, hcn[[i]]-hcn[[i-1]]]&&FreeQ[hcn, hcn[[i+1]]-hcn[[i]]],

AppendTo[a, i]], {i, 2, Length[hcn]-1}]; Take[a, 100]

CROSSREFS

Cf. A002182.

Sequence in context: A253159 A308311 A121375 * A347410 A253152 A305362

Adjacent sequences:  A342973 A342974 A342975 * A342977 A342978 A342979

KEYWORD

nonn

AUTHOR

Ivan N. Ianakiev, Apr 02 2021

STATUS

approved

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Last modified May 27 11:41 EDT 2022. Contains 354097 sequences. (Running on oeis4.)