A071633 - OEIS

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A071633

Number of terms in the set InvPhi(65536*p(n)), where p(n) is the n-th prime.

19, 82, 59, 46, 56, 34, 26, 20, 31, 52, 10, 56, 24, 34, 0, 30, 20, 20, 32, 37, 32, 24, 30, 37, 34, 24, 2, 26, 16, 35, 22, 46, 15, 20, 38, 14, 20, 58, 11, 22, 42, 24, 33, 46, 3, 20, 0, 18, 10, 12, 44, 56, 0, 29, 8, 0, 31, 14, 38, 44, 0, 30, 28, 9, 24, 18, 30, 34, 29, 8, 0, 50, 6

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OFFSET

1,1

LINKS

Donovan Johnson, Table of n, a(n) for n = 1..1000

EXAMPLE

invphi(65536*103)={6750209,13500418}, so a(27)=2; observe that a(15)=0 because 47 needs very large 2^i multiplier (instead of 65536) to give nonempty InvPhi set.

MAPLE

[seq(nops(invphi(65536*ithprime(i))), i=1..128)];

CROSSREFS

Cf. A000010, A005277, A007617, A058888, A002202, A071629-A071634.

Sequence in context: A172973 A212056 A290224 * A334086 A217052 A044206

Adjacent sequences: A071630 A071631 A071632 * A071634 A071635 A071636

KEYWORD

nonn

AUTHOR

Labos Elemer, May 30 2002

STATUS

approved