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<FONT FACE="Arial">Sorry, I am probably being dim here, but please could someone explain how A023567 is calculated?<BR>
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Thanks,<BR>
Jeremy Gardiner<BR>
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A023567 0,2,3,5,9,14,18,24,32,39,51,57,71,85,94,108,124,142,152,176,<BR>
Convolution of A023531 and primes.<BR>
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A023531 1,0,1,0,0,1,0,0,0,1,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,0,1,0,0<BR>
a(n) = 1 if n of form m(m+3)/2, otherwise 0.<BR>
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