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A087352
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a(n+1) is the smallest square > a(n) such that every concatenation (n > 1) is a prime.
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1
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1, 9, 49, 81, 441, 729, 15129, 33489, 35721, 127449, 184041, 288369, 505521, 594441, 1046529, 4004001, 4941729, 8415801, 14130081, 19474569, 20820969, 21427641, 25070049, 31236921, 33419961, 37197801, 57471561, 58201641, 58844241
(list; graph; refs; listen; history; internal format)
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