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#49 by Sean A. Irvine at Thu Apr 01 06:01:48 EDT 2021
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#48 by Michel Marcus at Wed Mar 24 14:08:25 EDT 2021
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#47 by Charlie Marion at Wed Mar 24 13:59:33 EDT 2021
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#46 by Charlie Marion at Wed Mar 24 13:59:30 EDT 2021
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Suppose the vertices of a triangle are (T(n), T(n+j)), (T(n+2*j, ), T(n+3*j)) and (T(n+4*j), T(n+5*j)) where T(n) is the n-th triangular number. Then the area of this triangle will be a(j). - Charlie Marion, Mar 06 2021
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approved
editing
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#45 by N. J. A. Sloane at Fri Mar 19 00:04:15 EDT 2021
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#44 by Charlie Marion at Sat Mar 06 10:49:36 EST 2021
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#43 by Charlie Marion at Sat Mar 06 10:49:17 EST 2021
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Suppose the vertices of a triangle are (T(n), T(n+j)), (T(n+2*j, T(n+3*j)) and (T(n+4*j), T(n+5*j)) where T(n) is the n-th triangular number. Then the area of this triangle will be a(j). - Charlie Marion, Mar 06 2021
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approved
editing
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#42 by Joerg Arndt at Fri Jan 29 04:48:12 EST 2021
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#41 by Michel Marcus at Fri Jan 29 04:13:11 EST 2021
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#40 by Amiram Eldar at Fri Jan 29 03:37:17 EST 2021
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