A215528 - OEIS

A215528

Slowest increasing sequence of alternate-parity integers m such that 2m^2+1 is prime.

1, 6, 9, 24, 27, 30, 33, 36, 45, 66, 75, 96, 99, 102, 105, 132, 135, 156, 177, 186, 189, 204, 219, 228, 237, 240, 255, 264, 273, 300, 321, 324, 327, 360, 375, 426, 429, 450, 483, 486, 489, 492, 519, 558, 585, 588, 597, 606, 621, 636, 657, 666, 693, 750, 759

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OFFSET

1,2

COMMENTS

Corresponding primes: 3,73,163,1153,1459,1801,2179,2593,4051,8713,11251,18433,19603,20809,...

LINKS

Zak Seidov, Table of n, a(n) for n = 1..1000

MATHEMATICA

s={1}; a=2; Do[While[!PrimeQ[2a^2+1], a=a+2]; AppendTo[s, a]; a++, {999}]; s

CROSSREFS

Cf. A215523 = Slowest increasing sequence of alternate-parity integers m such that 2m+1 is prime.

Sequence in context: A121592 A295726 A034718 * A155577 A084431 A176498

Adjacent sequences: A215525 A215526 A215527 * A215529 A215530 A215531

KEYWORD

nonn

AUTHOR

Zak Seidov, Aug 15 2012

STATUS

approved