A074402 Multiplicative closure of Euler's "numeri idonei" (A000926).

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

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: A247802 A245028 A351467 * A233264 A198343 A342382

Adjacent sequences: A074399 A074400 A074401 * A074403 A074404 A074405

Keyword

nonn

Author

Reinhard Zumkeller, Sep 25 2002

Status

approved