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A186981 Number of ordered 10-tuples of distinct pairwise coprime positive integers with largest element n. 3
8, 0, 8, 0, 8, 0, 244, 0, 1301, 288, 95, 58, 146, 20, 7089, 331, 571, 172, 25150, 100, 67678, 4036, 3850, 4522, 182152, 3784, 140446, 9592, 32890, 18634, 646954, 14014, 126562, 29788, 93394, 57742, 1655200, 8008, 3102319, 253594, 261118, 505219 (list; graph; refs; listen; history; text; internal format)
OFFSET

23,1

LINKS

Alois P. Heinz, Table of n, a(n) for n = 23..200

EXAMPLE

a(23) = 8 because there are 8 ordered 10-tuples of distinct pairwise coprime positive integers with largest element 23: (1,2,3,5,7,11,13,17,19,23), (1,2,5,7,9,11,13,17,19,23), (1,3,4,5,7,11,13,17,19,23), (1,3,5,7,8,11,13,17,19,23), (1,3,5,7,11,13,16,17,19,23), (1,4,5,7,9,11,13,17,19,23), (1,5,7,8,9,11,13,17,19,23), (1,5,7,9,11,13,16,17,19,23).

CROSSREFS

Column 10 of triangle A186972. First differences of A186986.

Sequence in context: A048729 A003131 A010679 * A156744 A228438 A021557

Adjacent sequences:  A186978 A186979 A186980 * A186982 A186983 A186984

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Mar 02 2011

STATUS

approved

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Last modified January 16 06:59 EST 2019. Contains 319188 sequences. (Running on oeis4.)