A020644 a(n)-th nonsquarefree is sum of first k nonsquarefrees for some k.

1, 4, 18, 53, 134, 154, 170, 319, 348, 373, 400, 460, 522, 552, 588, 661, 741, 858, 899, 985, 1033, 1081, 1275, 1324, 1375, 1769, 1829, 1949, 2143, 2276, 2475, 2687, 2988, 3063, 3222, 3304, 3384, 3466, 3553, 3636, 3724, 3994, 4085, 4469, 4561, 4663, 5055

Offset

1,2

Links

Table of n, a(n) for n=1..47.

Crossrefs

Cf. A013933, A013934, A013935.

Sequence in context: A284607 A297945 A320544 * A182031 A212250 A229788

Adjacent sequences: A020641 A020642 A020643 * A020645 A020646 A020647

Keyword

nonn

Author

N. J. A. Sloane, Renaud Lifchitz (100637.64(AT)CompuServe.COM), David W. Wilson

Status

approved