A109416 Triangle read by row where n-th row contains the least n primes of form 4k+1 if n is odd and of form 4k+3 if n is even such that sequence is always increasing.

5, 7, 11, 13, 17, 29, 31, 43, 47, 59, 61, 73, 89, 97, 101, 103, 107, 127, 131, 139, 151, 157, 173, 181, 193, 197, 229, 233, 239, 251, 263, 271, 283, 307, 311, 331, 337, 349, 353, 373, 389, 397, 401, 409, 421, 431, 439, 443, 463, 467, 479, 487, 491, 499, 503

Offset

1,1

Links

Table of n, a(n) for n=1..55.

Example

Triangle begins:
1: 5
2: 7,11
3: 13,17,29
4: 31,43,47,59
5: 61,73,89,97,101

Crossrefs

Cf. A108702, A109417-A109420.

Sequence in context: A348936 A346990 A038958 * A132170 A106309 A371566

Adjacent sequences: A109413 A109414 A109415 * A109417 A109418 A109419

Keyword

easy,nonn,tabl

Author

Ray Chandler, Jun 27 2005

Status

approved