

A109416


Triangle read by row where nth 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



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
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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, A109417A109420.
Sequence in context: A102386 A346990 A038958 * A132170 A106309 A227576
Adjacent sequences: A109413 A109414 A109415 * A109417 A109418 A109419


KEYWORD

easy,nonn,tabl


AUTHOR

Ray Chandler, Jun 27 2005


STATUS

approved



