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A055930 Number of distinct prime factors of totient of (n-th prime)!. 1
0, 1, 1, 2, 3, 3, 4, 4, 5, 6, 6, 7, 8, 8, 9, 9, 10, 10, 11, 11, 11, 12, 13, 14, 15, 15, 15, 16, 16, 16, 18, 18, 19, 19, 21, 21, 21, 22, 23, 23, 24, 24, 24, 24, 25, 25, 27, 29, 30, 30, 30, 30, 30, 30, 31, 32, 32, 32, 33, 34, 34, 34, 36, 36, 36, 37, 38, 39, 40, 40, 40, 41, 42, 42 (list; graph; refs; listen; history; internal format)
OFFSET

1,4

FORMULA

a(n)=A001221(A000010(A000142(A000040[n])))

CROSSREFS

A001221, A000010, A000142, A000040, A039716.

Sequence in context: A057355 A171975 A160511 * A079952 A090638 A057363

Adjacent sequences:  A055927 A055928 A055929 * A055931 A055932 A055933

KEYWORD

nonn

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Jul 17 2000

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.