Square triangular number: Difference between revisions

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Undid revision 1222802252 by 2001:56A:7D8E:F200:9033:3852:DC51:FF90 (talk) it is an extremely bad idea to use commas both to separate the numbers in a list and to separate the blocks of digits within each number
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In [[mathematics]], a '''square triangular number''' (or '''triangular square number''') is a number which is both a [[triangular number]] and a [[square number]]. There are [[Infinity|infinitely many]] square triangular numbers; the first few are:
:0, 1, 36, {{val|1,2251225}}, {{val|41,61641616}}, {{val|1,413,7211413721}}, {{val|48,024,90048024900}}, {{val|1,631,432,8811631432881}}, {{val|55,420,693,05655420693056}}, {{val|1,882,672,131,0251882672131025}} {{OEIS|id=A001110}}
 
==Explicit formulas==