A328079 First differences of A328078.

1, 1, 2, 4, 6, 12, 21, 43, 78, 156, 293, 583, 1118, 2208, 4277, 8423, 16422, 32280, 63117, 123951, 242782, 476560, 934181, 1833255, 3595254, 7054600, 13837949, 27151135, 53264270, 104505920, 205027797, 402264599, 789215654

Offset

0,3

Links

Table of n, a(n) for n=0..32.

Formula

Conjecture: G.f. = (4*x^11-8*x^10+4*x^9+4*x^8-8*x^7+7*x^6-4*x^5-5*x^4+2*x^3-2*x^2+1) / ((x^2+1)*(2*x^2-1)*(4*x^7-4*x^6+4*x^4-2*x^3+2*x^2+x-1)). - N. J. A. Sloane, Oct 16 2019

Crossrefs

Cf. A328078.

Sequence in context: A341858 A105541 A105536 * A321739 A073660 A102588

Adjacent sequences: A328076 A328077 A328078 * A328080 A328081 A328082

Keyword

nonn,more

Author

N. J. A. Sloane, Oct 13 2019

Extensions

a(8)-a(32) from Rémy Sigrist, Oct 15 2019

Status

approved