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A014134 Numbers that are not the sum of a square and a triangular number. 5
8, 13, 18, 20, 23, 27, 33, 34, 38, 41, 43, 47, 48, 58, 60, 62, 63, 68, 69, 73, 76, 83, 86, 88, 89, 90, 93, 97, 98, 99, 108, 111, 112, 113, 118, 123, 125, 132, 133, 134, 135, 138, 139, 143, 146, 148, 151, 158, 160, 163, 164, 167, 168, 173, 174 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..55.

PROG

(PARI) is_A014134(n)=for(k=0, sqrtint(n*2), issquare(n-k*(k+1)/2)&return); 1 (M. F. Hasler, Jan 05 2009)

CROSSREFS

Cf. A140867.

Sequence in context: A178968 A006613 A204221 * A085989 A095097 A187227

Adjacent sequences:  A014131 A014132 A014133 * A014135 A014136 A014137

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified September 23 00:13 EDT 2014. Contains 247086 sequences.