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].

1, 2, 2, 2, 3, 3, 3, 1, 1, 2, 1

Offset: 1

Author

N. J. A. Sloane, Dec 28 2010

Keywords

• nonn
• base
• fini
• full

Examples

			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
		

Links

• Table of n, a(n) for n = 1..11
• BigPrimes.net, Digit sums of primes

Crossrefs

For 2- through 9-digit primes the counts are in A177868, A178183, A178447, A178571, A178605, A178876, A178879, A178884.

Cf. 2nd row of A178701.