A262690 a(n) = largest square k <= n such that A002828(n-k) = A002828(n)-1.

0, 1, 1, 1, 4, 4, 4, 4, 4, 9, 9, 9, 4, 9, 9, 9, 16, 16, 9, 9, 16, 16, 9, 9, 16, 25, 25, 25, 25, 25, 25, 25, 16, 25, 25, 25, 36, 36, 36, 36, 36, 25, 25, 25, 36, 36, 36, 36, 16, 49, 49, 49, 36, 49, 49, 49, 36, 49, 49, 49, 49, 36, 49, 49, 64, 64, 64, 49, 64, 64, 36, 49, 36, 64, 49, 49, 36, 64, 49, 49, 64, 81, 81, 81, 64, 81, 81, 81, 36, 64, 81, 81, 81, 64, 81, 81, 64, 81, 49, 81, 100

Offset

0,5

Links

Antti Karttunen, Table of n, a(n) for n = 0..65536

A. Karttunen, Ratio a(n)/A048760(n) drawn with the help of OEIS Plot2-script

Formula

a(n) = A000290(A262689(n)).

Other identities. For all n >= 0:

A262678(n) = n - a(n).

Prog

(Scheme) (define (A262690 n) (A000290 (A262689 n)))

Crossrefs

Cf. A000290, A002828, A262689, A262678.

Cf. also A048760.

Sequence in context: A064053 A108893 A162281 * A048760 A287392 A035627

Adjacent sequences: A262687 A262688 A262689 * A262691 A262692 A262693

Keyword

nonn

Author

Antti Karttunen, Oct 03 2015

Status

approved