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A181807
Number of divisors of A181806(n) that are highly composite (A002182).
4
1, 2, 3, 5, 6, 7, 8, 10, 11, 14, 19, 20, 21, 22, 23, 24, 25, 28, 31, 32, 33, 35, 38, 39, 41, 48, 49, 52, 53, 57, 59, 65, 67, 69, 77, 81, 82, 86, 91, 94, 103, 105, 107, 114, 118, 122, 125, 131, 132, 135, 141, 142, 144, 145, 154, 157, 160, 163, 166, 171, 175, 180
OFFSET
1,2
COMMENTS
Also, length of row A181806(n) in triangles A181802 and A181803.
LINKS
Eric Weisstein's World of Mathematics, Highly composite number
FORMULA
a(n) = A181801(A181806(n)).
EXAMPLE
A181806(4) = 12 has exactly five divisors (namely, 1, 2, 4, 6 and 12) that are members of A002182. Hence, a(4) = 5.
CROSSREFS
KEYWORD
nonn
AUTHOR
Matthew Vandermast, Nov 27 2010
EXTENSIONS
More terms from Amiram Eldar, Aug 29 2019 (calculated from the b-file at A181806)
STATUS
approved