A343047 a(n) = A343046(n, n).

0, 1, 6, 9, 12, 15, 210, 217, 246, 249, 252, 255, 420, 427, 456, 459, 492, 495, 630, 637, 666, 669, 702, 705, 840, 847, 876, 879, 912, 915, 30030, 30061, 30246, 30279, 30252, 30285, 32550, 32587, 32586, 32589, 32592, 32595, 32760, 32797, 32796, 32799, 32832

Offset

0,3

Comments

This sequence has similarities with A087019 and A343043.

Links

Rémy Sigrist, Table of n, a(n) for n = 0..10000

Rémy Sigrist, PARI program for A343047

Index entries for sequences related to dismal (or lunar) arithmetic

Index entries for sequences related to primorial base

Formula

a(A002110(k)) = A002110(2*k) for any k >= 0.

a(A143293(k)) = A143293(2*k) for any k >= 0.

Example

For n = 2:
- the primorial base representation of 2 is "10", so:
         1 0
       x 1 0
       -----
         0 0
     + 1 0
     -------
       1 0 0
- hence a(2) = 2*3 = 6.

Prog

(PARI) See Links section.

Crossrefs

Cf. A002110, A143293, A343046.

Cf. A087019, A343043.

Sequence in context: A315955 A315956 A343043 * A023040 A001474 A084806

Adjacent sequences: A343044 A343045 A343046 * A343048 A343049 A343050

Keyword

nonn,base

Author

Rémy Sigrist, Apr 05 2021

Status

approved