

A112635


a(n) = rightmost term of nth row of triangle A112592. (For n >= 2, a(n) = number of terms in the (n1)th row of triangle A112592 which are coprime to n.)


2



0, 0, 1, 2, 4, 0, 3, 5, 4, 1, 10, 0, 6, 2, 13, 10, 16, 1, 18, 6, 14, 8, 22, 4, 23, 6, 17, 8, 28, 15, 30, 11, 19, 18, 24, 2, 36, 21, 28, 12, 40, 12, 42, 20, 24, 21, 46, 12, 47, 24, 36, 2, 40, 21, 49, 37, 22, 26, 58, 14, 60, 31, 51, 44, 50, 8, 66, 36, 44, 23, 70, 8, 72, 37, 55, 40, 62, 20
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OFFSET

1,4


LINKS

Diana Mecum, Table of n, a(n) for n = 1..517 [From Diana L. Mecum, Aug 12 2008]


EXAMPLE

The 6th row of triangle A112592 is [5,0,5,0,5,0]. So a(7) is the number of these terms which are coprime to 7. Now the three 5's are coprime to 7, but the 0's are not; so a(7) = 3.


CROSSREFS

Cf. A112592, A112631.
Sequence in context: A154585 A020822 A197514 * A222757 A004568 A079904
Adjacent sequences: A112632 A112633 A112634 * A112636 A112637 A112638


KEYWORD

nonn


AUTHOR

Leroy Quet, Dec 27 2005


EXTENSIONS

Terms a(10) through a(517) from Diana L. Mecum, Aug 12 2008


STATUS

approved



