cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-2 of 2 results.

A086259 Primes with at least four digits such that sum of any three_neighbor_digits is prime; first and last digits are neighbors.

Original entry on oeis.org

1151, 1193, 1319, 1373, 1511, 1733, 1913, 1931, 1973, 2003, 3119, 3137, 3191, 3371, 3559, 3719, 3779, 3797, 3911, 3917, 5953, 7193, 7331, 7793, 7937, 9137, 9173, 9311, 9371, 9377, 10111, 11113, 11119, 11131, 11311, 11551, 13313, 13913, 15511, 19139, 19319
Offset: 1

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Author

Zak Seidov, Jul 26 2003

Keywords

Comments

Because 3-digit terms coincide with additive 3-dimensional primes A046713, it is interesting to start with 4-digit primes. All of them may use only zero and odd digits, with the unique exclusion 2003 with one even digit. Primes such that sum of any two_neighbor_digits is prime A086244.

Examples

			1973 is a term because 1+9+7=17, 9+7+3=19, 7+3+1=11 and 3+1+9=13 are all prime.
		

Crossrefs

Extensions

More terms from Alois P. Heinz, May 10 2016

A162658 Primes such that the sum of its smallest and largest decimal digits is an odd prime.

Original entry on oeis.org

23, 29, 41, 47, 61, 67, 83, 103, 107, 163, 211, 223, 229, 233, 241, 269, 293, 307, 383, 421, 431, 433, 443, 449, 457, 461, 467, 479, 491, 499, 503, 509, 523, 547, 587, 607, 613, 631, 641, 661, 677, 701, 829, 853, 857, 863, 883, 929, 947
Offset: 1

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Author

Parthasarathy Nambi, Jul 09 2009

Keywords

Examples

			947 is a prime in which the sum of the smallest digit (4) and the largest digit (9) is an odd prime (13).
		

Crossrefs

Showing 1-2 of 2 results.