A262939 Quadrisection of A262940: a(n) = A262940(4*n+1) for n>=0.

1, 3, -21, -255, -478677, -7152407, 1291535081, 21021866227, -8367123104756933, -125486744208053623, 22639240870533272321, 368298497943774746859, 1120119534438107659394201, 17585651607496479804464699, -4001938301481614696345053989, -68798954684172515260606005119, -1021530045274545215678840405648561149029, -15322943216340426957307389817178091600759, 2767316465763270287090903125069152428833649, 45031940338831118856335051343515754947640891

Offset

0,2

Comments

a(n) = -A262940(4*n-1) for n>=1.

Links

Paul D. Hanna, Table of n, a(n) for n = 0..255

Prog

(PARI) {a(n) = local(A=[1, 1]); for(k=3, 4*n+2, A=concat(A, 0); m=2^valuation(k, 2); A[k] = 1 - Vec(Ser(A)^m)[k]/m ); A[4*n+2]}
for(n=0, 32, print1(a(n), ", "))

Crossrefs

Cf. A262940.

Sequence in context: A197716 A336638 A317059 * A232470 A349961 A251573

Adjacent sequences: A262936 A262937 A262938 * A262940 A262941 A262942

Keyword

sign

Author

Paul D. Hanna, Oct 04 2015

Status

approved