A376433 Number of n-digit primes in A104179.

4, 4, 8, 10, 17, 24, 46, 94, 139, 241, 416, 688, 1170, 1969, 3345, 5674, 9527, 16316, 27464, 46668, 78897, 134097, 226457, 381906, 645210, 1093472, 1843869, 3127129, 5278196

Offset

1,1

Links

Table of n, a(n) for n=1..29.

Example

a(3) = 8 because there are eight 3-digit primes {223, 233, 337, 353, 373, 523, 733, 773} that are concatenations of a 1-digit prime and a 2-digit prime that is itself a concatenation of 1-digit primes.

Crossrefs

Cf. A104179, A376434, A376435.

Sequence in context: A014687 A172022 A152967 * A301705 A309456 A004024

Adjacent sequences: A376430 A376431 A376432 * A376434 A376435 A376436

Keyword

nonn,base,more

Author

Karl W. Heuer, Sep 22 2024

Status

approved