A222306 - OEIS

A222306

Numbers n such that 4n is in A045980.

0, 2, 4, 7, 14, 16, 18, 31, 32, 38, 52, 54, 56, 70, 74, 79, 86, 108, 112, 117, 122, 126, 128, 130, 144, 151, 182, 189, 196, 234, 247, 248, 250, 252, 254, 256, 266, 268, 304, 326, 333, 338, 364, 367, 378, 416, 430, 432, 434, 436, 448, 486, 500, 511, 515, 518, 542, 549, 556, 558, 560, 592, 632, 635, 662, 670, 679, 682

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

LINKS

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

PROG

(PARI) T=thueinit('z^3+1); is(n)=n==0 || #thue(T, 4*n)>0 \\ Charles R Greathouse IV, Nov 29 2014

CROSSREFS

Cf. A045980, A222304, A222305.

Sequence in context: A101838 A286371 A030135 * A248220 A018476 A265309

Adjacent sequences: A222303 A222304 A222305 * A222307 A222308 A222309

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Feb 15 2013, based on a suggestion from Allan C. Wechsler.

STATUS

approved