A137158 - OEIS

The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Thanks to everyone who made a donation during our annual appeal!
To see the list of donors, or make a donation, see the OEIS Foundation home page.

A137158

G.f.: 1 = Sum_{n>=0} a(n)*x^n/(1+x)^(4*2^n).

1, 4, 22, 228, 4749, 200240, 17034964, 2913479848, 999402129243, 686662003846640, 944294243796543974, 2598186366278914473948, 14300408328085246335179009, 157434326611214704329370130880 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`0,2`
	COMMENTS	`Equals unsigned column 2 of triangle A137156.`
	LINKS	`Table of n, a(n) for n=0..13.`
	PROG	`(PARI) {a(n)=polcoeff(1-sum(k=0, n-1, a(k)x^k/(1+x+xO(x^n))^(2^(k+2)) ), n)}`
	CROSSREFS	`Cf. A137156; A001192, A137157, A137159, A137160.` `Sequence in context: A197963 A260296 A302769 * A025135 A125801 A195227` `Adjacent sequences: A137155 A137156 A137157 * A137159 A137160 A137161`
	KEYWORD	`nonn`
	AUTHOR	`Paul D. Hanna, Jan 24 2008`
	STATUS	`approved`

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 18 23:25 EST 2021. Contains 340262 sequences. (Running on oeis4.)