a(n) is the smallest nonnegative integer such that the sum of any four ordered terms a(k), k<=n (repetitions allowed), is unique.

A365300

a(n) is the smallest nonnegative integer such that the sum of any four ordered terms a(k), k<=n (repetitions allowed), is unique.

Terms

    a(0) =0a(1) =1a(2) =5a(3) =21a(4) =55a(5) =153a(6) =368a(7) =856a(8) =1424a(9) =2603a(10) =4967a(11) =8194a(12) =13663a(13) =22432a(14) =28169a(15) =47688a(16) =65545a(17) =96615a(18) =146248a(19) =202507a(20) =266267a(21) =364834a(22) =450308a(23) =585328a(24) =773000a(25) =986339a(26) =1162748a(27) =1472659a(28) =1993180a(29) =2275962

External references