

A108702


Triangle read by rows where nth row contains the smallest n primes of form 4k+3 if n is odd and of form 4k+1 if n is even such that sequence is always increasing.


5



3, 5, 13, 19, 23, 31, 37, 41, 53, 61, 67, 71, 79, 83, 103, 109, 113, 137, 149, 157, 173, 179, 191, 199, 211, 223, 227, 239, 241, 257, 269, 277, 281, 293, 313, 317, 331, 347, 359, 367, 379, 383, 419, 431, 439, 449, 457, 461, 509, 521, 541, 557, 569, 577, 593
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OFFSET

1,1


LINKS

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


EXAMPLE

Triangle begins:
1: 3
2: 5,13
3: 19,23,31
4: 37,41,53,61
5: 67,71,79,83,103


CROSSREFS

Cf. A109416A109420.
Sequence in context: A180120 A075704 A045413 * A136053 A157468 A191017
Adjacent sequences: A108699 A108700 A108701 * A108703 A108704 A108705


KEYWORD

easy,nonn,tabl


AUTHOR

Giovanni Teofilatto, Jun 20 2005


EXTENSIONS

Edited and extended by Ray Chandler, Jun 27 2005


STATUS

approved



