A236021 - OEIS

A236021

Record values in A236020.

1, 2, 4, 6, 12, 24, 36, 60, 72, 120, 180, 240, 360, 420, 720, 840, 1260, 1680, 2520, 5040, 7560, 10080, 15120, 20160, 27720, 30240, 55440, 65520, 83160, 110880, 166320, 196560, 221760, 277200, 332640, 360360, 393120, 720720, 831600, 1441440, 2162160, 2882880

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OFFSET

1,2

COMMENTS

Sequence of numbers from A236020 such that A236020(n) > A236020(k) for all k < n.

A236020 = natural numbers n sorted by increasing values of k(n) = log_tau(n) (sigma(n)), where sigma(n) = A000203(n) = the sum of divisors of n and tau(n) = A000005(n) = the number of divisors of n.

Conjecture: subsequence of A094348.

LINKS

Table of n, a(n) for n=1..42.

CROSSREFS

Cf. A236020, A236022, A236023, A236024, A236025, A236026.

Sequence in context: A140753 A328519 A234517 * A340637 A362782 A365900

Adjacent sequences: A236018 A236019 A236020 * A236022 A236023 A236024

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Jan 18 2014

EXTENSIONS

More terms from Jon E. Schoenfield, Nov 12 2016

STATUS

approved