A052201 Equivalent of the Kurepa hypothesis for left factorial.

4, 15, 48, 175, 816, 4851, 34960, 292743, 2774040, 29251651, 339184776, 4285584615, 58571107168, 860622082035, 13525670637216, 226358825764711, 4018390654376520, 75413358213752643, 1491684815796629080, 31014754853346045831, 676190458445520562896

Offset

1,1

Links

Table of n, a(n) for n=1..21.

Romeo Mestrovic, Variations of Kurepa's left factorial hypothesis, arXiv preprint arXiv:1312.7037 [math.NT], 2013.

Romeo Mestrovic, The Kurepa-Vandermonde matrices arising from Kurepa's left factorial hypothesis, Filomat 29:10 (2015), 2207-2215; DOI 10.2298/FIL1510207M.

Formula

a(1)=4, a(2)=15, a(3)=48, a(n) = (n+1)*( a(n-1)-a(n-3)) - 3*a(n-2).

a(n) = (n+3)*A051403(n-1). - Mohammed Bouras, Aug 05 2022

Crossrefs

Cf. A051403.

Sequence in context: A227099 A225976 A093967 * A320460 A178704 A099167

Adjacent sequences: A052198 A052199 A052200 * A052202 A052203 A052204

Keyword

nonn,easy

Author

Aleksandar Petojevic, Jan 28 2000

Extensions

More terms from James A. Sellers, Jan 31 2000

Status

approved