A109394 - OEIS

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A109394

A000934(A000934(n)).

10, 12, 13, 13, 14, 15, 15, 15, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 18, 18, 18, 18, 18, 19, 19, 19, 19, 19, 19, 19, 19, 19, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 22, 22, 22, 22, 22, 22

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

OFFSET

0,1

LINKS

Table of n, a(n) for n=0..60.

FORMULA

a(n) = floor( (7+sqrt(1+48*floor( (7+sqrt(1+48*n))/2 )))/2 ).

EXAMPLE

a(0) = 10 because A000934(0) = 4 and A000934(4) = 10.

a(1) = 12 because A000934(1) = 7 and A000934(7) = 12.

CROSSREFS

Cf. A000934.