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A373841
Numbers whose digital sum in the primorial base is a multiple of 3.
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.
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
KEYWORD
nonn,base
AUTHOR
Antti Karttunen, Jun 20 2024
STATUS
approved