A177868
a(n) = number of 2-digit primes with digit sum n, where n runs through the non-multiples of 3 in the range [2..17].
Original entry on oeis.org
1, 2, 2, 2, 3, 3, 3, 1, 1, 2, 1
Offset: 1
Digital sums of 2-digit primes
Sum count
2 1
4 2
5 2
7 2
8 3
10 3
11 3
13 1
14 1
16 2
17 1
A178183
a(n) = number of 3-digit primes with digit sum n, where n runs through the non-multiples of 3 in the range [2..26].
Original entry on oeis.org
1, 2, 4, 7, 7, 12, 13, 16, 16, 13, 18, 12, 11, 6, 4, 1, 0
Offset: 1
Digit-sums of 3-digit primes
Sum count
2 1
4 2
5 4
7 7
8 7
10 12
11 13
13 16
14 16
16 13
17 18
19 12
20 11
22 6
23 4
25 1
26 0
-
Join[SortBy[Tally[Total[IntegerDigits[#]]&/@Prime[Range[26,168]]],First][[;;,2]],{0}] (* Harvey P. Dale, Feb 08 2025 *)
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