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A384841

Numbers k for which sigma(k - x) + sigma(k + x) = 8*k has at least one nonnegative solution.

14412, 17640, 25581, 25623, 25659, 26208, 30240, 31110, 31380, 31500, 32340, 32736, 32760, 34958, 35112, 44211, 44343, 45048, 45324, 45444, 46578, 48090, 49368, 51674, 52045, 52290, 53103, 53127, 53460, 54000, 54180, 59400, 59940, 60228, 60903, 60914, 60987, 61920, 62340, 62370

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OFFSET

1,1

LINKS

Michel Marcus, Table of n, a(n) for n = 1..100

PROG

(PARI) isok(k) = for (x=0, k-1, if (sigma(k - x) + sigma(k + x) == 8*k, return(1)));

CROSSREFS

Cf. A000203 (sigma), A027687 (a subsequence).

Cf. A383268, A384838, A384839, A384840.

Cf. A383758.

Sequence in context: A144649 A166371 A234487 * A234977 A250960 A238060