A353544 Numbers k such that k and k+1 are both in A353543.

285, 43214, 190773, 2676321, 3027002, 3209073, 3894638, 5344118, 8963306, 15059985, 16558005, 18619634, 35731857, 36233846, 36413385, 37601342, 43559714, 52596434, 70700145, 75135962, 81136418, 83557617, 90577994, 91667666, 99846201, 111263074, 124896045, 128709801

Offset

1,1

Links

Amiram Eldar, Table of n, a(n) for n = 1..200 (terms below 10^10)

Example

285 is a term since both 285 and 286 are in A353543.

Mathematica

q[n_] := DivisorSigma[-1, n] > Pi^2/6 && AllTrue[Most @ Divisors[n], DivisorSigma[-1, #] < Pi^2/6 &]; Position[Partition[Array[q, 4*10^6], 2, 1], {True, True}] // Flatten

Crossrefs

Subsequence of A353543.

Subsequences: A283418, A330872.

Sequence in context: A241970 A231422 A146893 * A090089 A204379 A025384

Adjacent sequences: A353541 A353542 A353543 * A353545 A353546 A353547

Keyword

nonn

Author

Amiram Eldar, Apr 25 2022

Status

approved