A350968 a(n) = (A350967(n)-1)/2.

4, 499, 54940, 6042955, 664670164, 73107675139, 8041179595180, 884456647794715, 97282190077823524, 10700156451912792979, 1176919927520329404220, 129450491870784321671275, 14238377185858755054436084, 1566092039952592271666298019, 172255886017599291128238346060

Offset

1,1

References

E.-A. Majol, Note #2228, L'Intermédiaire des Mathématiciens, 9 (1902), pp. 183-185.

Links

Table of n, a(n) for n=1..15.

Crossrefs

Cf. A144930, A350967.

Sequence in context: A221554 A210310 A324155 * A221550 A022919 A253904

Adjacent sequences: A350965 A350966 A350967 * A350969 A350970 A350971

Keyword

nonn

Author

N. J. A. Sloane, Mar 03 2022

Status

approved