A379823 a(n) = (-1)^n * hypergeom([-n, n/2 + 1, n/2 + 1/2], [1, n + 2], 4). Central terms of A379907.

1, 1, 4, 17, 76, 352, 1667, 8017, 38992, 191276, 944648, 4690688, 23396023, 117130483, 588267604, 2962532945, 14954741680, 75647585152, 383359922324, 1945925312492, 9891894347360, 50350481125000, 256592858798416, 1309047896676352, 6684914267741951, 34168808617063927

Offset

0,3

Links

Table of n, a(n) for n=0..25.

Maple

seq(simplify((-1)^n*hypergeom([-n, n/2 + 1, n/2 + 1/2], [1, n + 2], 4)), n = 0..25);

Crossrefs

Cf. A379907.

Sequence in context: A290914 A117439 A081910 * A026773 A081186 A239204

Adjacent sequences: A379820 A379821 A379822 * A379824 A379825 A379826

Keyword

nonn

Author

Peter Luschny, Jan 06 2025

Status

approved