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A022757 n-th 4k+1 prime plus n-th 4k+3 prime. 2
8, 20, 28, 48, 60, 72, 96, 108, 132, 156, 168, 180, 192, 216, 244, 276, 288, 312, 332, 356, 364, 408, 424, 440, 468, 492, 504, 520, 544, 576, 588, 620, 656, 664, 704, 736, 756, 768, 788, 804, 852, 880, 896, 904, 972, 988, 1020, 1044, 1060, 1076, 1096, 1124 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..52.

FORMULA

a(n) = A002144(n) + A002145(n). - Sean A. Irvine, May 20 2019

MATHEMATICA

Select[1 + 4Range@150, PrimeQ@# &] + Select[ -1 + 4Range@135, PrimeQ@# &] (* Robert G. Wilson v, May 04 2006 *)

CROSSREFS

Cf. A002144, A002145.

Sequence in context: A110116 A295971 A317760 * A246308 A194218 A339273

Adjacent sequences:  A022754 A022755 A022756 * A022758 A022759 A022760

KEYWORD

nonn

AUTHOR

Clark Kimberling

STATUS

approved

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Last modified April 23 06:38 EDT 2021. Contains 343201 sequences. (Running on oeis4.)