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A137174 First differences of A138383. 0
0, 6, 4, 25, -13, 37, -25, 49, 73, -98, 146, -49, -73, 97, 121, 36, -218, 266, -109, -133, 314, -133, 193, 229, -350, -193, 217, -205, 229, 1241, -1169, 289, -530, 1168, -1144, 626, 36, -301, 361, 36, -698, 1504, -1480, 397, -385, 2069, 144, -1708, -445, 469 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..50.

MATHEMATICA

Differences[Join[{3}, (#[[2]]-#[[1]]) (Total[#]+1)/2&/@Partition[Prime[ Range[ 60]], 2, 1]]] (* Harvey P. Dale, Oct 27 2020 *)

CROSSREFS

Cf. A138383.

Sequence in context: A328757 A061592 A081631 * A129886 A133837 A211945

Adjacent sequences:  A137171 A137172 A137173 * A137175 A137176 A137177

KEYWORD

easy,sign

AUTHOR

Odimar Fabeny, May 11 2008

EXTENSIONS

More terms from Harvey P. Dale, Oct 27 2020

STATUS

approved

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Last modified May 24 02:41 EDT 2022. Contains 354005 sequences. (Running on oeis4.)