

A117382


Primes not expressible as the sum of two triangular numbers.


0



5, 17, 19, 23, 41, 47, 53, 59, 71, 89, 103, 107, 109, 113, 131, 149, 167, 173, 179, 197, 223, 229, 233, 239, 251, 257, 269, 271, 283, 293, 311, 313, 317, 337, 347, 349, 359, 383, 397, 401, 419, 431, 439, 449, 457, 467, 479, 491, 503, 509, 521, 523, 547, 557
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OFFSET

0,1


LINKS

Table of n, a(n) for n=0..53.


MATHEMATICA

Complement[ Prime@ Range@115, Union@ Flatten@ Table[i(i + 1)/2 + j(j + 1)/2, {i, 35}, {j, 0, i}]]  Robert G. Wilson v, Apr 27 2006


CROSSREFS

Cf. A000040, A117112.
Sequence in context: A249589 A040153 A038896 * A191076 A166685 A167915
Adjacent sequences: A117379 A117380 A117381 * A117383 A117384 A117385


KEYWORD

easy,nonn


AUTHOR

Greg Huber, Apr 24 2006


EXTENSIONS

More terms from Robert G. Wilson v, Apr 27 2006


STATUS

approved



