A081849 - OEIS

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A081849

Consider recurrence b(0) = (2n+1)/2, b(n) = b(0)*ceiling(b(n-1)); sequence gives first integer reached.

3, 20, 14, 468, 33, 299, 60, 47328, 95, 1218, 138, 25475, 189, 3161, 248, 20830128, 315, 6512, 390, 181138, 473, 11655, 564, 9015167, 663, 18974, 770, 671745, 885, 28853, 1008, 38906570560, 1139, 41676, 1278, 1799888, 1425, 57827, 1580, 110341278, 1743, 77690 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	MAPLE	`Digits := 100: c := ceil; A081849 := proc(a) local i, t0, t; t0 := a; t := 0; for i from 1 to 100 do if whattype(t0) <> integer then t0 := a*c(t0); t := t+1; else RETURN(t0); fi; od; RETURN('FAIL'); end;`
	CROSSREFS	`A001511 gives number of steps to reach an integer. Cf. A073524, A074078.` `Sequence in context: A084316 A126810 A115280 * A169642 A022129 A109218` `Adjacent sequences: A081846 A081847 A081848 * A081850 A081851 A081852`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Apr 13 2003`

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Last modified February 15 23:53 EST 2012. Contains 205860 sequences.