A353320 Odd numbers m such that there exists no k for which the denominator of d(k)/k = m where d(k) is the number of divisors of k (A000005).

243, 625, 1875, 3969, 4375, 5625, 6875, 8125, 9801, 10625, 11875, 13125, 13689, 14375, 18125, 19375, 19845, 20625, 23125, 23409, 24375, 25625, 26875, 29241, 29375, 30625, 31875, 33125, 35625, 36875, 38125, 41875, 42849, 43125, 43659, 44375, 45625, 49375, 50625, 51597

Offset

1,1

Links

Table of n, a(n) for n=1..40.

Crossrefs

Cf. A000005, A091896.

Sequence in context: A067838 A340757 A255111 * A331613 A255626 A205049

Adjacent sequences: A353317 A353318 A353319 * A353321 A353322 A353323

Keyword

nonn

Author

David A. Corneth, Apr 11 2022

Status

approved