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

1,2

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.

Links

Antti Karttunen, Table of n, a(n) for n = 1..12000

Index entries for sequences related to primorial base

Example

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

Prog

(PARI) isA373841 = A373840;

Crossrefs

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

Cf. also A373831.

Sequence in context: A195684 A135980 A314579 * A070873 A234037 A225836

Adjacent sequences: A373838 A373839 A373840 * A373842 A373843 A373844

Keyword

nonn,base

Author

Antti Karttunen, Jun 20 2024

Status

approved