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A074402 Multiplicative closure of Euler's "numeri idonei" (A000926). 0
1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 35, 36, 37, 39, 40, 42, 44, 45, 48, 49, 50, 52, 54, 56, 57, 58, 60, 63, 64, 65, 66, 70, 72, 74, 75, 78, 80, 81, 84, 85, 88, 90, 91, 93, 96, 98, 99, 100, 102, 104, 105, 108, 110 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..70.

EXAMPLE

22 is a term as A000926(17) = 22; 55 is not a term as 55 = 5*11 and neither 5 nor 11 are in A000926; 110 = 5*22 = A000926(5)*A000926(17), therefore 110 is a term.

CROSSREFS

Sequence in context: A247809 A247802 A245028 * A233264 A198343 A094270

Adjacent sequences:  A074399 A074400 A074401 * A074403 A074404 A074405

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Sep 25 2002

STATUS

approved

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Last modified March 31 23:42 EDT 2020. Contains 333152 sequences. (Running on oeis4.)