A165776 n + (least square > n), i.e., n + A048761(n+1).

1, 5, 6, 7, 13, 14, 15, 16, 17, 25, 26, 27, 28, 29, 30, 31, 41, 42, 43, 44, 45, 46, 47, 48, 49, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 145, 146

Offset

0,2

Links

Table of n, a(n) for n=0..65.

Formula

a(n) = A001477(n) + A048761(n+1)

Example

a(4)= 13 = 4+9 because 9 is the least square > 4.

Prog

(PARI) A165776(n)=n+(sqrtint(n)+1)^2

Crossrefs

Cf. A165775.

Sequence in context: A247522 A011761 A106745 * A327106 A003273 A006991

Adjacent sequences: A165773 A165774 A165775 * A165777 A165778 A165779

Keyword

easy,nonn

Author

M. F. Hasler, Oct 05 2009

Status

approved