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A080824
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Numbers n such that T(n)=T(A072522(n))+T(A072522(n+1)), T(i) being the triangular numbers.
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3
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6, 8, 11, 16, 46, 73, 856, 1238, 1493, 1731, 1931, 2193, 2713, 3238, 4006, 4648, 4781, 5534, 6240, 6458, 7793, 9039, 9491, 11456, 13290, 16041, 21388, 24439, 25449, 30327, 34682, 35837, 38153, 47071, 358732, 536644, 581296, 701563
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OFFSET
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1,1
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LINKS
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PROG
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(PARI) p=3; for(n=2, 50, t=p*(p+1)/2; for(k=p, 10^9, u=t+k*(k+1)/2; v=floor(sqrt(2*u)); if(v*(v+1)/2==u, print1(v", "); p=k; break)))
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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