a(n) is the smallest number k whose symmetric representation of sigma(k) shares sections of its border with those of n other numbers.

A362782

a(n) is the smallest number k whose symmetric representation of sigma(k) shares sections of its border with those of n other numbers.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =6a(4) =12a(5) =24a(6) =36a(7) =60a(8) =96a(9) =120a(10) =330a(11) =360a(12) =600a(13) =630a(14) =1170a(15) =1344a(16) =4760a(17) =2530a(18) =4500a(19) =5292a(20) =6120a(21) =9360a(22) =4200a(23) =23343a(24) =17136

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