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

1,2

Links

Table of n, a(n) for n = 1..11

BigPrimes.net, Digit sums of primes

Example

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

Crossrefs

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

Cf. 2nd row of A178701.

Sequence in context: A368460 A350679 A071451 * A178701 A181611 A064740

Adjacent sequences: A177865 A177866 A177867 * A177869 A177870 A177871

Keyword

nonn,base,fini,full

Author

N. J. A. Sloane, Dec 28 2010

Status

approved