A262688 - OEIS

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A262688

a(n) = square root of the index where A262680 reaches n for the first time.

2

0, 1, 2, 13, 18, 39, 354, 355, 652, 1309, 1310, 2227, 4976

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,3

COMMENTS

Natural numbers whose squares set new records for A262680.

Even and odd terms alternate.

LINKS

Table of n, a(n) for n=0..12.

FORMULA

a(n) = A000196(A262687(n)).

PROG

(PARI) \\ See A262687.

(Scheme) (define (A262688 n) (A000196 (A262687 n)))

CROSSREFS

Cf. A000196, A262680, A262687, A262515.

Sequence in context: A063615 A297837 A246358 * A020585 A038943 A019343

Adjacent sequences: A262685 A262686 A262687 * A262689 A262690 A262691

KEYWORD

nonn,more

AUTHOR

Antti Karttunen, Oct 03 2015

STATUS

approved