A373841 Numbers whose digital sum in the primorial base is a multiple of 3.

0, 5, 9, 10, 13, 14, 18, 23, 27, 28, 33, 34, 37, 38, 42, 47, 51, 52, 55, 56, 61, 62, 66, 71, 75, 76, 79, 80, 84, 89, 90, 95, 99, 100, 103, 104, 108, 113, 117, 118, 123, 124, 127, 128, 132, 137, 141, 142, 145, 146, 151, 152, 156, 161, 165, 166, 169, 170, 174, 179, 180, 185, 189, 190, 193, 194, 198, 203, 207, 208

Offset: 1

Author

Antti Karttunen, Jun 20 2024

Keywords

• nonn
• base

Comments

If x and y are terms and if A329041(x,y) = 1 (i.e., when adding x and y together will not generate any carries in the primorial base), then x+y is also a term.

Examples

			A049345(47) = 1221, so A276150(47) = 6, therefore 47 is included in this sequence.
		

Links

• Antti Karttunen, Table of n, a(n) for n = 1..12000
• Index entries for sequences related to primorial base

Crossrefs

Cf. A049345, A276150, A329041, A373839 (subsequence), A373840 (characteristic function).

Cf. also A373831.

Programs

PARI

isA373841 = A373840;