A353541 Starts of runs of 5 consecutive numbers whose abundancy index is larger than Pi^2/6.

330921744, 4810639922, 5851774772, 7352078822, 7453434624, 9289182174, 13353118622, 13640815824, 14009147072, 14294291372, 14595483174, 14711699274, 17516524022, 17999693072, 21640033412, 21997704572, 22174683684, 24521431022, 24815902472, 25362139074, 25826980022

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..26

Example

330921744 is a term since sigma(330921744)/330921744 = 2.583..., sigma(330921745)/330921745 = 1.671..., sigma(330921746)/330921746 = 1.647..., sigma(330921747)/330921747 = 1.663... and sigma(330921748)/330921748 = 1.762... are all larger than Pi^2/6 = 1.644... .

Crossrefs

Cf. A000203, A013661.

Subsequence of A353537, A353538, A353539 and A353540.

Sequence in context: A233708 A022239 A222978 * A271112 A337385 A233703

Adjacent sequences: A353538 A353539 A353540 * A353542 A353543 A353544

Keyword

nonn

Author

Amiram Eldar, Apr 25 2022

Status

approved