A179506 - OEIS

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A179506

Semiprimes in carryless digital root arithmetic in base 10.

9, 30, 33, 36, 39, 60, 63, 66, 69, 93, 96, 100, 110, 113, 116, 117, 119, 120, 121, 123, 126, 129, 130, 132, 135, 138, 139, 140, 143, 144, 146, 149, 150, 153, 154, 156, 159, 160, 162, 165, 168, 169, 170, 171, 173, 176, 179, 180, 183, 186, 187, 189, 190, 192, 195, 198, 199

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OFFSET

1,1

COMMENTS

Products of pairs of elements of A169911 in carryless digital root arithmetic in base 10.

LINKS

Table of n, a(n) for n=1..57.

Index entries for sequences related to carryless arithmetic

EXAMPLE

a(1) = 9 because the smallest prime in carryless digital root arithmetic in base 10 is 3, and 3*3 = 9.

CROSSREFS

Cf. A169911.