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A108702 Triangle read by rows where n-th 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 (list; table; graph; refs; listen; history; text; internal format)
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. A109416-A109420.

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

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Last modified September 28 00:46 EDT 2021. Contains 347698 sequences. (Running on oeis4.)