

A308530


The number of largely composite numbers (A067128) having the same number of divisors as the nth highly composite number A002182(n).


3



1, 2, 1, 3, 3, 2, 1, 1, 6, 2, 1, 2, 9, 1, 2, 2, 2, 8, 1, 2, 3, 2, 1, 1, 9, 1, 1, 3, 2, 5, 2, 2, 2, 8, 1, 2, 1, 6, 3, 6, 2, 2, 1, 6, 1, 1, 1, 5, 1, 3, 8, 1, 2, 5, 3, 10, 1, 2, 2, 4, 2, 3, 8, 2, 1, 6, 4, 11, 1, 1, 2, 2, 4, 2, 2, 6, 2, 4, 4, 8, 1, 5, 2, 1, 3, 4
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OFFSET

1,2


LINKS

Michael De Vlieger, Table of n, a(n) for n = 1..783


EXAMPLE

a(4) = 3 since there are 3 largely composite numbers with the same number of divisors as the 4th highly composite number 6: 6, 8, and 10.


MATHEMATICA

s = {}; dm = 1; c = 0; Do[d = DivisorSigma[0, n]; If[d == dm, c++]; If[d > dm, dm = d; AppendTo[s, c]; c = 1], {n, 1, 10^8}]; s


CROSSREFS

Cf. A000005, A002182, A067128.
Sequence in context: A088074 A071463 A335191 * A302555 A336692 A332434
Adjacent sequences: A308527 A308528 A308529 * A308531 A308532 A308533


KEYWORD

nonn


AUTHOR

Amiram Eldar, Jun 06 2019


STATUS

approved



