A178876 a(n) = number of 7-digit primes with digit sum n, where n runs through the non-multiples of 3 in the range [2..62].

0, 5, 21, 95, 138, 420, 773, 1747, 2329, 4616, 6456, 10496, 12743, 18710, 22447, 29209, 32075, 38631, 41150, 44442, 44915, 44025, 42891, 37872, 35177, 28462, 24722, 18033, 15169, 9903, 7611, 4220, 3227, 1599, 959, 387, 283, 87, 31, 4, 1

Offset

1,2

Links

Table of n, a(n) for n=1..41.

BigPrimes.net, Digit sums of primes

Example

Digit-sums of 7-digit primes
Sum     count
2       0
4       5
5       21
7       95
8       138
10      420
11      773
13      1747
14      2329
16      4616
17      6456
19      10496
20      12743
22      18710
23      22447
25      29209
26      32075
28      38631
29      41150
...

Crossrefs

Sequence in context: A126952 A273570 A103519 * A202513 A361775 A343349

Adjacent sequences: A178873 A178874 A178875 * A178877 A178878 A178879

Keyword

nonn,base,fini,full

Author

N. J. A. Sloane, Dec 28 2010

Status

approved