A066397 Reversion of 1 / sqrt(1 - 4*x) (the o.g.f. for the central binomial coefficients A000984) as if it were an e.g.f.

1, -2, 6, -20, 50, 168, -4732, 54024, -356670, -1558040, 106069172, -2197188864, 26605890220, 22266781600, -12120090377400, 402165029201744, -7732409047854318, 38209542402620232, 4126723132306766900, -211906442415502467360, 5955735723962955009156

Offset

0,2

Links

Table of n, a(n) for n=0..20.

N. J. A. Sloane, Transforms

Index entries for reversions of series

Maple

read transforms; t1 := 1 / sqrt(1 - 4*x); t2 := series(t1, x, 50); t2 := seriestolist(%); REVEGF(%); # corrected by Sean A. Irvine, Oct 12 2023

Crossrefs

Cf. A000984.

Sequence in context: A204422 A027558 A320910 * A060344 A363600 A347582

Adjacent sequences: A066394 A066395 A066396 * A066398 A066399 A066400

Keyword

sign

Author

N. J. A. Sloane, Dec 24 2001

Extensions

Name corrected by Sean A. Irvine, Oct 12 2023

Status

approved