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A141443 Conjectured to be complete list of numbers not of the form 2*x^2 + y^2 + 12*triangular number. 8
5, 7, 10, 26, 35, 65, 92, 127, 322 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..9.

Ben Kane and Zhi-Wei Sun, On almost universal mixed sums of squares and triangular numbers, arXiv:0808.2761

MATHEMATICA

Reap[For[n=1, n <= 400, n++, If[FindInstance[n == 2x^2 + y^2 + 12z(z+1)/2, {x, y, z}, Integers] == {}, Print[n]; Sow[n]]]][[2, 1]] (* Jean-Fran├žois Alcover, Oct 01 2018 *)

CROSSREFS

Cf. A141273, A141386, A141423, A141428, A141463.

Cf. A141464, A141491, A141497.

Sequence in context: A113194 A088768 A131998 * A215660 A015849 A059303

Adjacent sequences:  A141440 A141441 A141442 * A141444 A141445 A141446

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Sep 05 2008

STATUS

approved

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Last modified July 22 02:26 EDT 2019. Contains 325210 sequences. (Running on oeis4.)