A004040 - OEIS

This site is supported by donations to The OEIS Foundation.

A004040

Inversion of A000257.

1, 2, 6, 23, 103, 512, 2740, 15485, 91245, 555662, 3475090, 22214707, 144640291, 956560748, 6411521056, 43478151737, 297864793993 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	FORMULA	`Invert: define b by 1+Sum a(n)x^n = 1/(1 - Sum b(n)x^n).`
	CROSSREFS	`Essentially the same as A022558.` `Sequence in context: A098746 A088929 A174193 * A022558 A005802 A061552` `Adjacent sequences: A004037 A004038 A004039 * A004041 A004042 A004043`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`

Content is available under The OEIS End-User License Agreement .

Last modified February 17 19:13 EST 2012. Contains 206085 sequences.